I often wonder how much slut shaming has to do with women who expect/want this sort of behavior from men. Does it make them feel like they aren’t “responsible” for the sexual encounter if the guy is pushy, therefore they aren’t a slut?

this is 99% of it. It's about plausible deniability if things don't go well. it's all about pushing all the responsibility onto the man.

When have you ever met a woman admit to being bad at sex?