Do you make fun of or feel sorry for someone who has no friends or very few friends?

I'm curious how people see this.

I don’t have a big friend circle, just a few people. I’ve (33 M, single) had issues in the past with toxic friendships and bullying, and I’m naturally introverted. I actually like who I am now and I’m comfortable having only a couple of close friends. I’ve even started making a few new connections after joining CrossFit.

But something happened recently that bothered me.

I met up with a long-term friend(toxic), and he asked what I did over the weekend. I told him I met another friend (also someone I’ve known for years, but he doesn’t know him). He started giggling and said, “What friends?” Then he got judgmental, saying he never sees me with anyone and basically implying that I don’t have a social life.

He’s quite insecure and tends to put me down in front of others , I think it’s an ego thing, but it still made me feel like shit afterwards. He's does that often and also mock me for not having a girlfriend.

It made me wonder: Do people actually make fun of someone for having few friends, or feel sorry for them, without knowing their story? Would you make fun of someone or your own friend for having less friends?