Online dating is largely a scam. People were meeting up through the internet, locally or not, and dating as a result of that long before those monstrosities hit the scene and tried to commodify it. Women don't tend to enjoy using them, either, so there's a large body of people that just don't - and so what you've got on those platforms are mostly people who either don't know any better (rare these days) or the bottom of the barrel. And if you're the bottom of the barrel, get a fucking hobby and do some exercise.
Attractive women tend to have this thing called fucking "confidence," which dumpy, ugly, oddball, and quirky women all curiously can also have. Confidence is great, because you can be fun and flirty and engaging and generally just have a good fucking time without worrying day-in day-out about OH NO HOW IS SHE THINKING ABOUT ME DO PEOPLE LIKE ME AM I COOL AM I DOING IT WRONG AM I -- those are traits that the average mook would be annoyed by in a woman, yet seems to think is fine for they themselves to exhibit?
If the only reason you're interacting with a chick is because you want to date them, they're gonna fucking pick up on it, brah. That'd be why it's good to interact with a chick, say, because you both happen to enjoy underwater basket weaving and -then- if something sparks from that, contemplate that interest. Despite how much epic braincels gold I'm sure a lot of master manipulators and PUA have gotten, it's generally pretty transparent that the incel-types interact with people less because they like them and more because they're desperate to get laid. Gee, wonder why she would take someone over the guy who's down for any hole he can get.
Twice and I got rejected both times.
Are you dead? Did you lose any limbs? Have to take any medication? Turns out it won't kill you and it isn't so bad unless you dwell on it enough to make it bad.
Getting rejected is a normal part of being a dude and growing up. I've been out of the scene for a bit myself, but I must've had advances rebuffed so many times - thirty, forty? Then one clicks, you're in a relationship for a few years at a time, and it works out or it doesn't work out. Or you hook up, provided that's your angle.
If you're not confident, do shit to make you confident first. The kinds of women you'll bag if you're an unconfident sack of shit aren't generally the kinds you're gonna want to keep around - and don't take the stupid interpretation of 'confident' either. Confident people doubt themselves, have plenty of worry and image issues and all sorts of those concerns aplenty; but confident people above all else have committed themselves to self-love, self-improvement, and making the most out of their existence on this rock however long it takes. Fundamentally, unconfident people have committed themselves to none of those things, and instead have nursed excuses for why it's OK for them not to do so.