I haven't read the whole thread, but it seems to me there's been a misunderstanding, or at least a difference of opinion, about what "running a session" involves.

In my book, it means getting the ball rolling, attracting other musicians, and then giving everyone the chance to play. If there's a lull, it's your job to fill it until someone else is ready to start a tune.

It does not involve playing tune after tune, even if you are prepared to "let anyone" play with you.

Sessions are complicated things, there are a lot of expectations and assumptions and unwritten rules, and it takes time and experience to learn how to read them and how to fit in. And yes, if you're running the session you can to some extent make the rules, but make sure everyone involved understands them and is prepared to go along with them.

But if you're in a session which is not to your liking, then either put up with it or move on.