Some men operate on what I have always called the 'Babe Ruth Principle'.
BR was a world-famous baseball player, who hit more home runs than any of his contemporaries. No problem, he hit more balls than them as well.
So if you apply that logic to asking women for sex, the alw of averages says, the more you ask, the more chances of getting a positive response.
Of course, this only works for men whose requirements for a suitable sexual partner are a vagina and a pulse.
So for them the internet is like a planet-sized nightclub without the tedium of chatting up a girl and buying her a drink - they can go straight to the question, and if its'a 'No', they can move on until someone says yes, as eventually they will.
So it's not the 'nrom' except for men who are simply looking for sex. If this is the majority of the men you are encountering, you are on the wrong site, so change it and looke elsewhere.
Internet Dating, no matter what you are looking for, is like the rest of the Internet - you have to be very selective, about what you pick up and explore, and what you ignore as unsuitable.
With experience, you will develop a 'filter' for what is going to be a potential man you;d like to date, and what is going to be a "Do you **** or what?".
Be patient, and know that there are loads of men out there who are not just looking for sexc, all you need is the patience to find one.
Like all the best endings, you need to kiss a lot of frogs before you find a prince - both those characters are alegorical, so don't panic about the 'kissing' bit.
Good luck!