His poor judgment or actions are not your fault nor should they be your burden. Take those grains of truth and work with them to morph them into something you like better. His point in time assessment does not need to be your future.

In the future if someone treats you this way you have the opportunity to leave and report them. Someone being bad to us does not mean we are bad. It means we have put ourselves, oftentimes through well intended action, in the path of an abuser. It is what we do in the moment we see them for what they are that matters. Essentially, tell that voice that berates you to shut it!