do you think it is wrong? and why?
Assalamu alaykum
Imam Shafi' was student of imam malik, was he maliki what mathab was imam shafi'? Imam Ahmad studied from imam Shafi', what mathab was Imam Ahmad? What mathab was imam Abu Hanifah. Makes no sense. That is why alhamdulillah we follow the qURAN the sunnah the way the prophet

taught us the the salaf-as saleeh.
Please read what The imams used to say. Note, please find me a statement where any of the Four Imaams said " you must follow a mathab, or you must follow only my mathaab"? This is nothing more than blind following.
Imam Abu Hanifah r.a
That is my madhhab
Imaam Abu Haneefah (rahima-hullaah) said:
((When a hadeeth is found to be saheeh, then that is my madhhab)).
Ibn 'Aabideen in al-Haashiyah (1/63) and in his essay Rasm al-Mufti (1/4 from the Compilation of the Essays of Ibn 'Aabideen), Shaikh Saalih al-Fulaani in Eeqaaz al-Himam (p. 62) and others. Ibn 'Aabideen quoted from Sharh al-Hidaayah by Ibn al-Shahnah al-Kabeer, the teacher of Ibn al-Humaam.
Imaam Abu Haneefah (rahima-hullaah) said:
((It is haraam for someone who does not know my evidence to give fataawa on the basis of my words)).
Another narration adds:
((... for we are mortals: we say one thing one day, and take it back the next day)).
Ibn 'Abdul Barr in Al-Intiqaa' fi Fadaa'il ath-Thalaathah al-A'immah al-Fuqahaa' (p. 145), Ibn al-Qayyim in I'laam al-Mooqi'een (2/309), Ibn 'Aabideen in his Footnoes on Al-Bahr ar-Raa'iq (6/293) and in Rasm al-Mufti (pp. 29, 32) & Sha'raani in Al-Meezaan (1/55) with the second narration. Similar narrations exist on the authority of Abu Haneefah's companions Zafar, Abu Yoosuf and 'Aafiyah ibn Yazeed; cf. Eeqaaz (p. 52). Ibn al-Qayyim firmly certified its authenticity on the authority of Abu Yoosuf in I'laam al-Mooqi'een (2/344).
Imaam Abu Haneefah (rahima-hullaah) said:
((When I say something contradicting the Book of Allaah the Exalted or what is narrated from the Messenger (sal-Allaahu `alayhe wa sallam), then ignore my saying)).
Al-Fulaani in Eeqaaz al-Himam (p. 50), tracing it to Imaam Muhammad and then saying, "This does not apply to the mujtahid, for he is not bound to their views anyway, but it applies to the muqallid.
Imam Malik r.a
Imaam Maalik ibn Anas (rahima-hullaah) said:
((Truly I am only a mortal: I make mistakes (sometimes) and I am correct (sometimes). Therefore, look into my opinions: all that agrees with the Book and the Sunnah, accept it; and all that does not agree with the Book and the Sunnah, ignore it)).
Ibn 'Abdul Barr in Jaami' Bayaan al-'Ilm (2/32), Ibn Hazm, quoting from the former in Usool al-Ahkaam (6/149), and similarly Al-Fulaani (p. 72)
Imam Shafi' r.a
Imaam ash-Shaafi'ee (rahima-hullaah) said:
((The Sunnahs of the Messenger of Allaah (sal-Allaahu `alayhe wa sallam) reach, as well as escape from every one of us. So whenever I voice my opinion, or formulate a principle, where something contrary to my view exists on the authority of the Messenger of Allaah (sal-Allaahu `alayhe wa sallam), then the correct view is what the Messenger of Allaah (sal-Allaahu `alayhe wa sallam) has said, and it (that) is my view)).
Related by Haakim with a continuous sanad up to Shaafi'i, as in Taareekh Dimashq of Ibn 'Asaakir (15/1/3), I'laam al-Mooqi'een (2/363, 364) & Eeqaaz (p. 100)
Al-Shaafi’i, may Allaah have mercy on him, said: “I do not know of anyone among the Sahaabah and Taabi’een who narrated a report from the Messenger of Allaah (peace be upon him) without accepting it, adhering to it and affirming that this was sunnah. Those who came after the Taabi’een, and those whom we met did likewise: they all accepted the reports and took them to be sunnah, praising those who followed them and criticizing those who went against them. Whoever deviated from this path would be regarded by us as having deviated from the way of the Companions of the Prophet (peace be upon him) and the scholars who followed them, and would be considered as one of the ignorant.
These imaam were sincere and followed a sound and authentic hadeeth from the prophet

. If they were upon and then later they found a hadith countradicting what they were upon, they would stop doing what they used to do and follow the hadith automatically. But not like those blind followers who attribute themselves to their mathaabs. If you bring a hadith that is clear and authentic showing that what they follow in their mathab as incorrect, they will say "that is not what my mathab says" , clear ignorance. They have thrown away what the prophet

and use what their mathab says.
Any person who is seeking knowledge will know that in order to find the mistakes of your own shaikh, you need to go study with another shaikh. Everyone is able to make error in judgment in matters of religion except the prophet

. And how could he when he is getting Wahhii (revelation )directly from Allah subhanahu wet'ala.
So this is why i believe that following it is not an obligation. Following the prophet

is an obligation.
All of us should be sincere and change when we get proof from Quraan and sunnah. If we don't and it is clear, than it is nothing but arrogance.
the prophet

said that
It was narrated from ‘Abd-Allaah ibn Mas’ood that the Prophet (peace and blessings of Allaah be upon him) said: “No one who has an atom’s-weight of arrogance in his heart will enter Paradise.” A man said, “O Messenger of Allaah, what if a man likes his clothes and his shoes to look good?” He said, “Allaah is Beautiful and loves beauty. Arrogance means rejecting the truth and looking down on people.”
Narrated by Muslim, 91.
Al-Tirmidhi reported from Abu Raafi’ and others that the Prophet (peace be upon him) said: “I do not want to see any one of you reclining on his couch and, when he hears of my instructions or prohibitions, saying ‘I don’t accept it; we didn’t find any such thing in the Book of Allaah.’” Abu ‘Eesaa said: This is a saheeh hasan hadeeth. (See Sunan al-Tirmidhi, Shaakir edition, no. 2663).
Shaykh salih al munajid
As regards your second question, about whether a Muslim is required to follow a particular madhhab, the answer is that he does not have to. For the average “rank and file” Muslim, his madhhab is that of his mufti or the scholar whom he consults for religious verdicts; he must ask those pious scholars whom he trusts for opinions when necessary. If a person has enough knowledge to distinguish which evidence and opinion is stronger, then he must follow the scholarly opinion which has the strongest support from the Qur’an and Sunnah. It is acceptable for a Muslim to follow one of the four well-known madhhabs, on the condition that he understands that the truth in any given issue may lie with another madhhab, in which case he must ignore his own madhhab’s opinion and follow the truth. The Muslim’s aim is to follow the truth that is in accordance with the Qur’an and Sunnah. The madhhabs of fiqh are only a means of reaching ahkaam (rules) based on the Qur’aan and Sunnah, they are not Qur’aan and Sunnah.
We ask Allaah to show us the truth and help us to follow it, and to show us falsehood and help us to avoid it. May Allaah bless our Prophet Muhammad.
Islam Q&A
Sheikh Muhammed Salih Al-Munajjid
So, please read through this and do not mention to us anymore about mathabs.
Barkallahu feek
Allah knows best
wassalam