I'm going to sound like an Apple apologize, but what's wrong with Apple Music on the web? I just launched it (for the second time in a while), and after signing in, was presented with a familiar looking UI and all my playlists, and was playing searched-for music in under a minute. I know Apple prioritizes their platforms first, but this doesn't seem like an example of Apple failing a competing platform.

Apple Music on Android is actually really good, I use it daily. On some level it was a priority for them for market share, to compete with Spotify. I don't see the "competitor" in this space (cloud) though that would drive that necessity.

The AppleTV app on my LG TV is the best third party app on it, IMO. Looks and works great.

Their Roku and AndroidTV apps are also good. I'm not sure I've ever even used the service on a piece of Apple hardware, and it's never been a problem.