Yep, because we have very negative associations with criticism. In addition to being bullied, we tended to move a lot when I was a kid. So it became easy to just leave and start over somewhere else - I think I even started to look forward to being able to start over. I remember as a kid playing with other kids and after a bit just disappearing and hearing them in the distance say "hey, where did he go?" - I'd often do this. Much later I came to realize that this was some kind of avoidance and that it wasn't the norm. I think that I expected even amicable play situations to eventually lead to being bullied and I think that's why I'd just ghost people.