It's funny how differently people respond to that type of stuff.
I grew up playing pretty competitive sports. Being ripped apart in front of my peers was a once a week occurrence for me for most of my life. I had no interest in doing it to anyone else, but it didn't seem like a big deal, and didn't bother me much.
My first job was at a company where it happened a lot. I didn't realize how toxic it was until I started talking with co-workers who were having panic attacks from it.