Bullying was always part of vtubing. In early years when it started becoming popular, not raiding other vtubers made everyone mad at you for stealing views. Streamers were spreading rumors about people who didn't raid. They would often talk behind your back because of that bs or create smear campaign among streamers. This is the reason why nowadays pretty much every decent size vtuber always raids someone else and also why vtubing was really enclosed space for longest time. In those times minding your own business was issue for others. Would suspect that and all the constant drama is why some want a way out of the community. Which was discussion topic at the end of the year, and some people still treat it like cult which you need to be dedicated 110% to.