First I just thought it was one toxic guy who picked up on me and had a knack on finding bully targets. Then, I have changed teams away from this dude and I felt I was surrounded by sane people this time but it happened again. It starts with one person making fun of me and others start to pick it up.

I was exactly the same when I was young. Fast forward a few decades and it is all gone.

I think it is some general lack of confidence. The (apparently) weakest one gets eaten.