Sorry to hear your about your experience. I can't really say much about the server since I'm not there. Was it part of their guidelines that the topic was a banned offence? If not, strange it's not listed.
If you're still keen to find a writing community, other than here, I'm part of a discord group called The Writer's Circus. This group is currently small with writers from all over. We're always striving to be welcoming to writers.
Either way. I hope this experience doesn't deter you from being part of that server if you're keen to rejoin and allowed back in.
Hopefully you'll receive an explanation and chance.
All the best.