Hmm. Well, there are people who are like this, but you do seem to have got yourself in a lot of situations where you were somewhere, or they were at your place, and you ended up feeling pressured.
It's not the case that all women, or maybe even most (it's hard to say), find themselves in such situations quite so regularly. So maybe there are things you could do to avoid these situations which would certainly be nicer from your perspective. There is probably not much you can do to stop weirdos and jerks from being weirdos and jerks, so avoiding them is really your best option.
I suppose based on my own experience and observations of people I know I have two thoughts. One is that if you are dating guys you don't know well, especially OLD, I would simply avoid asking them to yours, or going to theirs, unless you are getting to the point of getting serious about the relationship. That's not always convenient but it takes a lot of those scenarios off the table and also is probably safer all round.
The other is that some social/dating circles take sex to be an early and usually inevitable part of dating. The expectation is that people you meet online will be having sex if you have a second or certainly third date, and maybe on the first if it goes well. When people have that kind of expectation around dating interactions, it affects how they behave - they kind of assume that everyone knows that you are heading towards a sexual encounter - that is what they think dating is for.
There are other social circles where that is not the expectation (though many of these people don't do OLD much or at all.) They tend not to assume that dating will lead to sex soon, or maybe at all, and think in terms of months, or until the relationship becomes fairly serious, and some kind of decision is made to brig sex into the picture. While you will still get people who are exploitative or assaulters, you won't get the same assumption across the board that sex is on the table by date three.
People seem to move within one or the other of these circles in terms of dating, and TBH I am not sure how they differentiate in a lot of cases - maybe age or how they meet up, or something else. People I know seem to belong to one or the other and that reflects their values in some way. But maybe if you don't want an assumption that casual sex is going to be part of the dating scene most of the time you could try and find a dating scene where it isn't?