I went to plenty of parties when I was much younger, and trust me when I say you aren't missing out on much.
Some incels get the idea that parties are like how those hollywood movies from the 90s and 2000s portray them, but those are just written that way to appeal to male fantasy.
Every party I have ever been to has been a sausage fest to some degree. Usually guys will be vocal about it too. "ey yo! where the bitches at?" "can we get some bitches up in here?" "ey yo next time everybody gotta bring a bitch!".
There are a lot of parties where there is an even ratio or more women, but as an ugly male you won't get invited to them. One time a chadlite friend of mine tried to bring me to a party he was invited to. This girl opened the door and she was like "him, NO!" my friend tried to talk her into allowing me in and she was just all "EWWWW NO! YOU DIDN'T TELL ME YOUR FRIEND LOOKED LIKE THAT EWWWWWW". Naturally I wasn't allowed in. On another occasion a good looking friend of mine texted this girl who was hosting a party if he could bring a friend (me). She asked him to sent her a pic. I instantly told him "no, don't bother, she's gonna say no." He acted like I was being absurd for even suggesting this would happen, but he talked me into it, took a pic of me, sent it to her....and of course she said no.
Getting back to the point though...parties are for the most part, remarkably boring. Maybe they're fun if you're super into drinking, but I never was and only drank socially. I've only been truly "shitface" drunk a handful of times and it's not really a pleasant experience for me. I'm just more irritable when drunk, and I always got a horrible hangover. Anyway, there's a chance someone who's drunk and/or high will do something extremely stupid and it might provide a moment of entertainment value, but that's really about it. Other than that it was getting rejected by any single women that were there (I was in "cold approach" mode at this age) and watching some movie I'd already seen before with a bunch of other dudes. And for some reason at a bunch of parties I went to there'd be a guy who convinces everyone to watch Loose Change (9/11 "truther" documentary, pretty sure that's where the "jet fuel can't melt steel beams" meme came from, or at least what inspired it, but they were being completely unironic). Like this happened like 6 times...and it's not like it was the same guy every time either. I had to sit through that shit 6 fucking times, because there'd always be some dudebro who insisted it would blow everyone's mind. JFL.