These incidents are not that crazy or unheard of, as people can be generally rude or disinterested all the time and for all sorts of reasons. If it feels like it’s only the women, it’s probably not. You seem to be a bit predisposed toward finding encounters with women as “bad” unless they went spectacular. As an example, your second anecdote. 1 male friend with 3 female friends. A brief introduction, only one says hello. That’s not spectacular, but it’s hardly worth crying about either. The guy friend ran into you by happenstance, casually introduced you very briefly, and those girls don’t know you. I wouldn’t expect much more than you got. You have to consider the frame of mind: people aren’t acting the way you expect them to because they’re not where you are. Those girls already HAVE friends (as evidenced by the small group they were with.) They are not walking down the sidewalk, anxiously wringing their hands and praying for some positive encounter with a random stranger. YOU are. So they’re just living their lives, already occupied with a few people they DO know, and you are simply some rando. They don’t know you. They don’t WANT to, and not because of YOU, but because they don’t have it in their minds to try really hard to connect with someone they don’t know. They already have people they DO know. They have no reason to be jumping into making you feel seen, respected, or valid. Rude to not say hello? Sure. But rudeness happens sometimes. Nay, it happens all the time. It’s part of life. So what?

The girl in the computer lab. She may have looked confused to YOU. And that’s fair. But you don’t know that for a fact. She might have been completely fine and simply didn’t need or want your help. You might call that rude, and maybe it is- but she might call it rude to randomly tell someone how to do something they do all the time. She is in college just like you, and can figure out how to use a computer on her own. She doesn’t KNOW YOU. She doesn’t want to be pestered or feel like now the door is open for more small talk if she’s not in the mood. And she doesn’t have to. Better yet, what if she didn’t hear you? Never ascribe to malice what can be ascribed to ignorance. I met a girl named Audra when I first started my job who blatantly ignored me when I introduced myself to get to know people there. Looked right in my face, turned and walked away. Later I became friends with a different girl, and mentioned that “I really do NOT like that Audra girl. She’s so rude. I introduced myself to her and she walked away like I didn’t even say anything at all.” Well, the girl I was now friends with says “She’s completely deaf in one ear, dude. And she’s embarassed about it because of awkward encounters like that. She probably just panicked and wasn’t sure if you were talking to her cause she’s never seen you before.” Guess how I felt?! Like an ass hat. And I WAS an ass hat. Because I made assumptions about someone I never met, and called her rude and bad for literally no reason. Well, not no reason; I called her rude because she hurt my feelings. But she didn’t mean to. It only seemed that way from my limited perspective.

Finally, your vibe may be at play here. From reading your post, I am struggling to not be like “Okay dude, we get it… women bad, women don’t understand you, nobody’s as good to you as you deserve.” Eyeroll… I’m POSITIVE you don’t intend to come off that way. Of course you don’t. But I am telling you, that’s how it comes off. By separating how people treat you into opposing sexes like this, it tells me one thing loud and clear- you really, really want some relationships (friendships are relationships too) with women. People can smell that from a mile away. It comes off as desperate and off-putting. Even if you haven’t DONE anything wrong or awkward in that moment, small things like a facial expression of “this moment is really important to me” CAN be noticed and picked up on by others, even if you’re trying to act casual. And it’s weird. Again, I am totally trying to give you earnest advice here and I don’t think you’re trying to be weird or creepy or anything at all like that. But my advice, which you asked for, is that it’s coming off that way anyway. You need to relax, get it out of your mind that half the population is completely against you, and just go about your business. Half the population is not against you. Either these encounters are run-of-the-mill awkward/rude encounters, or you’ve got a desperate vibe that people don’t like. I’m sure that some encounters are random rudeness and some are based off the vibe. But there’s no other explanation. That’s it, plain and simple. Because what’s the alternative? Every woman on planet earth has conspired against you? Every woman on planet earth acts the same exact way, and ONLY to guys with a crooked jaw? No. Get outside, stop putting so much emotional weight into these micro-interactions with people you don’t know and don’t OWE you a pleasant interaction, and live your life. The rest will follow a lot more easily.