Pushing the MC ahead of everyone else is what makes some stories go downhill, Naruto was like that, Fairy Tail, and many other shounen.
It's funny how the best shounen and seinens not only had a good MC, but also excellent supporting characters.
Why do you think One Piece is a big success? Do you think it would be the same without the Admirals, without some cool villains like Enel or even Kaido, without the crew, Zoro, Usopp?
If you reduce everything to the MC and only he can do everything and everything in the verse is about him, what we know as Nika Piece, and you agree with this shit, just assume that you don't care about good writing and that you have your agenda above everything.