Why do people hate Lil' Wayne so much?

I mean when people say stuff about him they never ever have a reason, all you get is "Lil' Wayne is garbage" or "Lil' Wayne is wack" < what the f*ck sort of reason is that for hating him so much? and I know someone will say it's because he calls himself the best rapper alive but he never said that before MTV called him that, and which rapper hasn't called themselves the best rapper alive? Plus "Tha Carter 3" had quite a few good tracks on it, and I bet none of you who call him garbage have ever listened to one of his albums so you're talking out ya backside