He's like like pretty much every other rapper that's not an experimental and musical type of artist that just raps
Can't do hooks, has no melody, can't use non hip-hop production, can't sing even with the help of Autotune, doesn't have a big female fan base, has a niche fan base which is male hip-hop heads that are mainly blacks/latinos in their 30's on wards, has no harmony. He offers nothing besides rapping as that is all he does
But i can't say he is overrated because even though he has platinum and gold albums and hit singles (we know why they hits though because of the RnB singer featuring to do the hook) because he still hasn't sold near the amount of records Jay Z has who is a rapper just like him that does nothing besides rapping too