This will delete all your data, including channels, videos, comments and you won't be able to create another user on this instance with "<x id="PH" equiv-text="this.user.username"/>" username.
Your IP address is public so every time you consult a website, there is a number of actors (in addition to the final website) seeing your IP in their connection logs: ISP/routers/trackers/CDN and more. PeerTube is transparent about it: we warn you that if you want to keep your IP private, you must use a VPN or Tor Browser. Thinking that removing P2P from PeerTube will give you back anonymity doesn't make sense.