Boyfriend feels bad after violent argument in public?

A girl was starting to insult and threaten me, so my boyfriend stepped in and tried to control her but instead she kicked him where it hurts hard enough to send him to the ground.
So she continued insulting me and we ended up fighting. Finally some women came, so she ran away. And I was not injured

Now he keeps saying how unfair she was, that normally she should have backed off quickly.
I feel he is embarrassed about it and I already told him it's fine, I managed to defend myself but it looks like it doesn't help much.

I need some more ideas to understand his mind and help him.
Updates
+1 y
I must add, even it is obvious, I feel bad for him
Updates
+1 y
Do you think he feels unsecure about it? Maybe he needs to see a psychologist
Updates
1 y
An update to thank you and if it can help someone else tell you my boyfriend went a few times to a psychologist and I think it really helped him
Boyfriend feels bad after violent argument in public?
Post Opinion