I definitely can’t argue about the size of their library! While the continued dragging of their feet on HiFi was frustrating (years of telling us it was coming), the thing which finally drove me away is their constant tweaking of playlist and queue management.
I mainly use their desktop client and controls would disappear with each update- no way to block songs, inability to remove a song from auto generated queues, playlists not syncing between devices, songs being weighted in a shuffle. I made a post on their forums about the missing options for their autoplay queues- their response was that while there was no button or context menu option to remove a song, I could select it and use the delete key. I just gave up on whatever type of user experience they want me to have.
I very much go through this. It can be hard looking at all the niche things around my house which I spent so much energy pursuing - specialized photography rigs, magic cards, jewelry making tools+storage, exercise gear, crazy keyboard setups for multiboxing, etc. With all of those came the community aspect. I feel so guilty just disappearing after gaining so much attention and recognition in various areas. I can confidently say I’m paralyzed with some type of fear to get into new things- I know they’ll consume me, but then one day I’ll wake up and just see it as a source of stress and drop it. If I had infinite money and loved socializing, I’d not be too stuck, but I just can’t afford to keep cycling through interests right now. The things which tend to interest me always demand a financial sink.