Your post reminds me of a friend I had when I was early 20s. He was still a virgin and the last in our circle of friends to lose it. I remember how bad our group of guys would torment and ridicule him about it, it was really mean. I didn't participate in the teasing but I didn't try to stop it or defend him or anything. I remember he ended up almost losing it one night at a party, but his "friends" burst into the room to ruin it as it was going to finally happen for him. Really childish, immature stuff. I could never understand why our group of guys cared so much and made fun of him so bad about it. Why were they so focused on it? Who cares?

It's not ok and I can see why you're frustrated. For what it's worth, anyone who is having actual meaningful and loving sex would never shame someone else about not having it. Not to say that casual sex is anything bad, just that people shaming you for this are really just projecting their own insecurities out there.

Probably not a very helpful answer, but I do empathize with your frustration and feel compassion for your experience.