we know that they are main characters.the whole story revolves around them.so why people talk negative about them?
don't make fun of them.
e.g naruto is not mature, naruto's intelligence level is poor,obito cant control juubi!. you see he controlled him nicely... and praising other characters against them...all are secondary protagonists and antagonists.
even madara and hashirama don't have main rights in story.