There’s many solutions ive heard like

• Associating an account with a Gov ID so bans are more permanent
• Maybe a reputation system? get kicked enough, or downvoted enough and you get permabanned
• many channels like ltt on the wan show and SomeOrdinayGamers (and many others) have talked about it extensively, but there’s always a drawback

All these options are based on some level of trust with someone or something and can be easily taken advantage of, but these are concepts nonetheless.