It annoys me when I see people suggest that a smaller woman cannot physically attack a larger man on the grounds that he is stronger than her. Once she decides to initiate a physical attack, any response from me would only enrage her even more, and the only way I could stop her would be to really hurt her. I can't do that. I won't do that. So I stand my ground and wait for her anger to subside.
This is my brother's situation all over. He's 6'3" and an ex-rugby player. He was in an emotionally and physically abusive relationship that culminated with her throwing an iron at him. It only missed because it was plugged into the wall and was caught by the lead.
I don't think you will find a single intelligent person who would dispute that, on a class analysis level, men physically abuse women more than vice versa, or that male-on-female abuse is, on average, more physically damaging to the victims. But some of the minimising that goes on on this board is pretty appalling, whether it's the likes of the OP knee-jerkingly doubting statistics that suggest that f-on-m abuse may be a real problem, or the usual refrain that any female abuser had been driven to violence by her partner.