A lot of trauma is internalization. You blame yourself. It's made to be your fault. You're told you're a terrible person. Get mad about what happened to you. Anger is your tool for being pissed off and asserting your boundaries.
Anger is very hard to control, can easily backfire into self-loathing and cause you to strain existing relationships, which can also further fuel internal anger at oneself. If you get mad about what happened to you and start lashing out at others, you risk isolating yourself and deepening your depression.
I'm studying emotional philosophy and I think it's great advice. Executive function disorders stem from an inability to healthily feel and use anger. If you had a parent who monopolized expressions of anger during your childhood, you're going to have problems with executive function as an adult.
Fear and anger are like look and leap. People who can't feel anger can only look and never leap.
Anger's the 'do something' emotion. We associate it with the big 'do something' events like flipping over a table, but it also governs everything you do all day long.
Second this - it can also cause a split personality, the usual inner monologue becomes abusive as you blame yourself, so you get angry at it, which feeds the condition.
Too much anger is bad. Suppressing justified anger might be unhealthy though. So long as it's moderated, anger can be an appropriate response to some things.
Anger is very hard to control, can easily backfire into self-loathing and cause you to strain existing relationships, which can also further fuel internal anger at oneself. If you get mad about what happened to you and start lashing out at others, you risk isolating yourself and deepening your depression.