Peace aramis
I agree that Qur’an and Hadith are the source of knowledge, but I don’t think it is called inventing our own version if we follow the scholars who are experts in Qur’an and hadith.
Also, I agree that we should be ONE, but that oneness is our spiritual unity not our physical unity. We will not be able to operate as a massive one thing. It is okay for some Muslims to do certain things and other do other things. But because one group is doing something different to another this does not give them cause to undertake one-upmanship against one another. Rather they should be happy with each other, open and inviting. If that is what you mean by one unit then I agree, if you say that madhabs should not exist then I cannot agree.
We should not be rival companies but departments in the same company serving a common goal.