One very easy thing you can do to increase your attractiveness is to change your goal from "short to medium-term sexual relationships" to love and commitment.

Is this even possible? I mean, I've not chosen my current goal after careful planning, I just noticed that at the moment I'm attracted to short-term relationships, how would I go into changing that? I am searching for shor-term, highly sexual relationships, should I just tell the girl I'm not?

None of them are perfect. Probably none of them look like models. A lot of them might be divorced and/or already have children. A lot of them are overweight. I don't know how it works in Italy but in the USA the best place to find them is online.

Does this come from the 'date in your league' advice? Because I've been naturally attracted to somewhat overweight girls, I adore feminine curves, but I've never convinced them to date me. They too seemed to be more attracted to the fit or blue-eyes guy... perhaps they should realize to date in their league too.

When I tried online dating, about three-four years ago, there didn't seem to be many women, at least in my area. Maybe the situation has changed now.

You should realize that most women have zero interest in you. That's true for almost every man. Increasing your general attractiveness to anything below rock-star level probably won't move the needle much for most women.

I probably don't need rock-star level of available women. Indeed, that would have massive disutility. I just need say 2-3 girls who I can have fun with.