EDIT: @mindbleach@sh.itjust.works shared something that might help to circumvent this shit:
Contained in these parentheses is a zero-width joiner: ()
Basically, add those to whatever you feel that might be filtered out, then remove the parentheses. The content inside the parentheses is invisible, but it screws with regex rules.
And odds are that the admins are basically running some glorified version of AutoMod, so fucking with their regex would work nicely. I'll try this next account, thank you! (Also adding it to the OP)