Haven't been able to post to other servers for a long time now

I have been trying to make threads on wayfarershaven.eu, lemmy.ml, beehaw.org and lemmy.world. For weeks. Comments work but links/photos/posts do not. They obviously never actually make it to the instance... sometimes I can delete them, sometimes I can't.

Initially I was just testing on lemmy.world and assumed it had to do with their constantly going down due to bot and DDOS attacks, but it seems like this must be a kbin problem.

It's becoming pretty tiring. I don't really want to bother participating anymore if I'll never be able to post anywhere other than kbin.social.