This isn't about who's actually overrated it's about who you prefer to listen to. I think Kanye is the black Trump but the guy can rap. Bieber is a spoiled brat but the kid can sing. Not a huge fan of Dylan but his music defined an entire generation, same goes for The Beatles.
Just because you don't like someone doesn't mean they're overrated. It just means you have a different taste in music. By the way, Taylor Swift writes slot of her own music (with help) the girl is annoying as $$$$ but she has musical talent.