Is it a DbD effect, though?

I have gotten to wondering, are some survivors/killers just Like That or has it taken playing against Those Kinds of survivors/killers to make them that way?

A friend of mine was upset after a game getting flashlight blinded and then afterwards flamed in the chat. She is new to the game and it clearly brought her down. Not enough that she wanted to quit, but enough that it was definitely a damper on her mood. I suggested we play survivor together and somehow we ended up in a lobby with the survivors who bullied her. They proceeded to bully the killer we were up against and then flame them in chat after as well. We both called them out on it, and they didn't really respond but we were kinda like "...Yeah, they just do that every game regardless of who it is or how they play."

Also, a player who goes by Jaee has been getting recommended to me on YT after I started watching Puppers and he just like....

He does this thing where he'll do like a "Survivor" voice complaining about him AS he plays and, idk, he seems extremely jaded in some of his videos and I am like "...This really seems like something DBD did to him."

Idk I just got to wondering.