If you want to clean up your profile, you can remove old bans every six months through the profile settings (Chaturbate → Settings → Privacy & Blocking). However, this will not affect the flow of new people.

Seven years of streaming — that's a lot of experience, and a big ban list kind of comes with the territory. CB bans are generally username-based rather than IP-based, which is why you still see new accounts popping up. The "connected usernames" entries are CB's system trying to catch alt accounts based on things like IP or browser fingerprints, but it's not perfect. Eva's suggestion to do a periodic cleanup through Settings is a good move. It won't stop new trolls, but at least it keeps things tidy on your end. Unfortunately dealing with rude viewers is just part of the job — having a quick ban trigger and moving on is the best approach.