My biggest complaint about Soundcloud is their lack of pagination, sorting, or shuffling (real shuffling, not just shuffling the 20 tracks that come in with every infinite scroll page). I have well over a thousand likes on my profile and the only way to listen to some of my earlier likes is to sit there like an idiot and scroll through a hundred pages of infinite scroll.

Also, their iOS app doesn't cache songs. The lack of caching on its own has forced me to go back to Spotify for 99% of my music. I'm not about to pay $80/month for data just for Soundcloud.