I share each of your frustrations with Ventura 13.2 | Mail!
My Silicon Mac Mini was updated to Ventura 13.2. As of Saturday, my Mail has been crashing left and right. I've gone down various resolution approaches without much to show. I removed the Cox account with the same results as each of you. I did two Ventura re-installs and countless restarts and shutdowns. I deleted all Internet Accounts and just loaded iCloud - Mail crashed.
Apple Tech Support: I spent countless hours on Saturday and yesterday with Tier 2 Apple Support. Yes, they are aware of the problem (they acknowledged it), but they have no solutions or workarounds. They escalated to Apple Engineers.
COX Tech Support: Today, I spoke to Cox Tech and relayed my issue, questions, and research. Only the field engineers working the servers can address any server problems, Tech has no visibility to server logs. Tech would not forward the case. 🫤
Apple or Cox or both have a severe problem. Based on Mail behavior, the probability is very high this is a Ventura 13.2 problem. In the meantime, I work in a hobbled state until a permanent fix is found and released.
Temporary Solution: I keep using the Shift key to reopen | open Mail and continue working. Nor do touch the Trash folder to avoid Mail crash.