My anger tends to come out either when I'm overwhelmed with anxiety and feel trapped - you know, kinda like a cornered animal - or when I'm vulnerable and have a difficult time expressing myself.

My therapist recommended a book called The Anger Trap. I think it's pretty good. It's shown me things that I've always "known" but need to be more mindful of.

I think it'd be good to read the book a few times as I feel like you don't get the full benefit in one go through.