Minecraft Java has a serious issue with its username filter. It's riddled with false positives, but is also extremely easy to bypass. I've seen people have the N-word as their name by changing 1 letter. It's really annoying that I'm dealing with filter issues while people who are actually saying inappropriate things are able to get away with it. Attached are some examples of names that are completely PG that are blocked, and also attached are some examples of how easily bypassed the filter is.

P.S. No need to tell me to go to Support or the Feedback Center, I've been to both multiple times over the past couple of years, and neither have been able to fix the issue. 

EDIT: Added another picture that is just blatant profanity, but is allowed for some reason.