Man I would have snapped. You said he was an old guy so I woulda got in his face so he could try to do something. Then I woulda crack him a couple of times and dropped him on his head if he did something. Not to protect the foid (if I could get one), but just because I'm filled with rage already and letting shit like that slide would only descend me deeper into a much darker place of anger where I don't wanna be. So gotta let off some steam.
I would probably get arrested and have a record as I have a couple of years striking/grappling training. No ones gonna side with you when you bust an old man up. Even if he struck first lol.
But if it was a fat 6ft tall 260 lber, I would most likely go away with the foid.
This is why incels should gymmax and train striking arts like boxing or muay thai, and learn the very basics of grappling, takedowns, takedown defense, very basic submissions. You don't wanna be totally weak and clueless when you find yourself being punked somewhere. Have some pepper spray ready in case the dude getting his ass whooped pulls out a knife.