Well, it's up to you then.
Stick around and contribute with useful input that might help to make MusicBee even better, or find your satisfaction and try to reach your goals elsewhere.
The snowflakes here won't melt either way.
We'll see. The long term support of this project is a big black hole contingent on one person. I'd love for him to maintain control but there's nothing stopping this project from disappearing forever overnight.
How horrid, that there might be the possibility of one less thing in the world meant to serve (for free) you!
In any case, as I said, all this snark is unproductive. It seems MusicBee gets you ninety percent of what you nEeD... so, instead of being a drain on the community, be a contributor and write plug-ins (for which an API is available) for the hyper-specific demands that apply only to your environment and workflow.
Alternatively, you could pay all of Steven's bills and living expenses. Then maybe we'd be more considerate of you telling him what he was to do with his projects.