Tired of feeling guilt over ending a bad relationship

Gotta love it when even months later, the friend of the very ex I broke up with is still in the back of my head telling me that I "ruined" him and that he's still "dealing with that problem."

I'm sorry, but not sorry that I ended a toxic relationship and that he's too emotionally stunted to deal with it like an adult. Same guy refuses to seek therapy because he doesn't want people to take his weapons collection away (again, I know, what was I thinking dating someone like that?)

The guilty feeling needs to stop because I had every right to end it. I also shouldn't have given him any reason why it ended and I don't care how "cowardly" it was to break up with him through text because I don't want to have any direct conflict and yelling over the phone like he did to me several times before.

I'm done feeling guilty at all. He was awful to me and overly paranoid of me. Again, I had every right to end it without any rhyme or reason.

I'm done.