I don't think forcing one year of Rex on a GM is a deal breaker. Most GMs outlast the coaches. The new GM is a long term hire, if the are so concerned about one year of Rex, add a year to their contract.
So you are admitting the team will be a total failure next year, BTW I agree totally, Wrecks has ruined this team and next year will be just as bad if not worse than this year. Expect it.