It wasn't just poor qb play, it was bad draft picks on the offensive line, at wide out. You can't draft a pocket passer and not provide a pocket. Likewise with Lamar, he has to be able to create, so you need wide outs who know how to keep routes a live when the play break down. You need linemen who don't stop after shouting watch out.
There is so much that goes into a qb being an mvp than just his talent.