Your manager is obviously hoping you will just leave and save him the hassle of managing you out if the business. IMO: talking to him about the situation is a

Your manager is obviously hoping you will just leave and save him the hassle of managing you out if the business. IMO: talking to him about the situation is a mistake and may force his hand. You’ll be out on a PIP and setup to fail. Line up another job - then talk to your manager. Don’t burn any bridges with the current company. No point trying to get petty revenge on your current manager. You’ve just found a better opportunity and can’t turn it down.