Does anyone has or had experiences with a partner with anger issues?

I love my boyfriend, I really do, we get along very well, we have fun, we talk about everything, sex is great, everything is great really.. But one thing, he has anger issues.

When he gets angry he says the worst thing to me and I can't really do anything but trying to calm him - it doesn't always work.

At the beginning I used to get really touched and offended by his behaviour but then we talked and I understood he is struggling a lot with himself and his demons and it really breaks my heart to see him like this.

I had anger issues as well when I was younger but luckily I found my own way to deal with that! But again my way isn't his way so I don't know how to help him.

Any suggestions?