Where to begin
Apps are laggy. Sync is delayed. Split brain with home pods. Really unreliable in the car whereas Spotify was flawless - often pauses for 30s-1min while buffering.
music.apple.com is a hot mess. It auto redirects to the US store even though I'm in the UK AND LOGGED IN, then complains my content isn't available in the UK. To change, I have to click a dropdown with the option selected "Select country or region", click "Continue", scroll to the "Europe" section, click "United Kingdom". It still doesn't think I've selected the right region, so it pops ups up the region selection bar at the bottom persisently.
iTunes on Windows. Needs no explanation. Just a total piece of crap. Out of sync with iOS - I added an album 2 days ago and it's not showing up in iTunes.