Lil Wayne???

So I'm sure you have heard him as many names Dwayne Carter, Lil Wayne Weezy, Wizzle the best rapper alive etc. What does that really mean to people now-a-days? In my opinion his way with punchlines and just raw musical talent makes him the best in the game. Now with that being said there are some rappers that are able to make cool punch lines(his protege Drake) but he nor is anybody like Wayne. He is very creative in his flow in fact he is the epitome of creativity withh his metaphoric style. Most of his metaphors sound correct backwards and forward. My question is why he is such a controversial subject.