It’s the other way around for me, wanted to play in Star Wars KotOR setting, one time one guy showed up (but only over voice call), another time my buddy agreed to play.

Then wrote something in one DM’s setting, only that DM showed up, said the quest was actually cool with good ideas yadda-yadda and mentioned it on another game, and later reused some of the moments in his own ones.

But me coming to other DMs’ games seems welcomed.

Was told I had to form my own group and write my own adventures.

I think they didn’t like you or your way of playing busted something in the quest their DM wrote, or something like that.