Lupe Fiasco is way overrated?

Why are people putting this scrub on their top 5 greatest rappers of all time lists, when masterminds like DOOM, mos def and Guru get don't even graze such lists. Lupe is not underground, everyone listens to him and thinks he's underground. He may rap about meaningful things, but there are countless people who rap about meaningful things way better than he can. I cannot find one song other than Hurt Me Soul that does not sound like a mainstream hybrid of fellow overrated rappers such as kanye west and lil wayne. He is a limper simple simon rhymin mc.