Garou never killed anyone. That's part of why Saitama let him off.
And these neo-heroes are no better than the association. And the management is a lot more shady too. It's probably led by monsters actually.
Well, if she doesn't like him that way, that's that.
You can't force these things. No matter how many times he tries.
She can't change her feelings just because of a couple vague promises that may never come to.