[KozmoNau7]

Google Play Music's catalogue is absolutely terrible. They cram together artists with similar names, put wrong artist pictures on artist pages, and there is absolutely no way to get them to fix it. I have submitted a large number of support requests and error reports for mislabeled content, and exactly none of it has been fixed.

In comparison, Spotify usually fixes reported content errors within a week or two, and they're started a thing called Line-In, where users can directly submit edits to content information. The edits are obviously still vetted, but it speeds up the process significantly.