100% this.

My advice is to remember this isn’t all about you and how you feel. This is about them and their future. In situations like this I like to think I’m doing them a favor and that now they will be able to find a job that suits them a lot better.

Getting fired doesn’t necessarily have to be a bad thing. It can open doors of opportunity and growth for someone in ways they never imagined, even though right now it may not seem that way. You have to believe that firing them will improve their life and career over the long haul.