Believe it or not, most people will stop doing things if they are convinced that it isn't in their self interest. The idea that trauma is effective at getting people to stop doing something is neither accurate or acceptable. Trauma could easily make some people lash out and cause even more damage. If there's something we shouldn't tolerate, it's people who want to inflict unnecessary and unproductive harm on other people. It probably didn't make you less of a threat.

You need help, and not just therapy. You would benefit from real life friends and positive interactions with people who treat you as an equal. Residential treatment might be a good idea if you haven't done it before. Treatment will only work if you work with it. It's assistance, not having the problem solved for you. You need to do some of the lifting.