This seems to make the assumption that there is a right and wrong way to have sex and that there is a definitive list of things that women do and do not enjoy.

Of course it stands to reason that porn marketed to men will put more focus on the parts that men are more likely to enjoy and the marketing will also reflect this.

So a scene showing fairly vanilla sex will be labelled "slut gets destroyed by huge cock" or something.

To be honest I would suspect that women in porn who truly hate the experience wouldn't last too long. It's more likely that they simply find it boring after a while than outright unpleasant. In other words doing anal to them would be like debugging to us.