Call them women, not females.

It's a little thing but it really is quite noticeable. When you say "female" you're just referring to the sex/gender, like you would with any species of animal, but when you say "women" you're validating that it's humans you are talking about, and of the female variety. It's not a huge deal, but it's just something that I've noticed a lot of incels/redpillers etc have slipped into their language and that combined with some of the other anti-woman stuff can really send a strong message combined.
I guess if sex is what you're looking for, yeah, but the fact that men would fuck me doesn't necessarily fill me with joy or fulfilment, I want more than that. Plus, when you're doing a one time fling, the guy has a lot less incentive to make the sex good for you, so... in that regard, men definitely have the advantage.
I agree about the gender imbalance, they are pretty sausage fest-y, and lots of guys just blanket message every woman in the area which blocks out a lot of legitimate guys looking for a connection of sorts.