I hear what you are saying. It would have been nice if your boss would have said "hey, what's going on" or talked to you in some way before making such an important decision on your worth. That is what a good boss would do.

I took an interpersonal relations and communications course in college years ago and it had some management training. It suggested that if an employee is not doing what they usually or previously have done, that you talk to them about it. You are even suppose to ask "is there anything the company can do to support you". It doesn't sound like your boss did this unfortunately. Maybe they need more management training . I'm sorry this happened and that you lost so much money.