You are complaining about sports, but the only experience you've related is with video games - which are at best tangentially related at best. What's up with that?
I've been involved with various competitive sports for decades now. Boxing, Muay Thai, Wrestling, Brazilian Jiu-Jitsu, Judo, Tae Kwon Do, Aikido. The competitive aspect of these sports is largely focused on determining how well you've learned the techniques you've been taught, and the pressure/intensity of going head to head with a fully resisting person helps you to gauge this better than any other way. (For example, in BJJ when you start winning tournaments regularly you get promoted to the next belt level . . . and then get crushed for a few years while you adjust to the higher skill of the opponents.) There's always someone more skilled, faster, and stronger . . . and it's always possible for a lucky punch or well timed throw to knock you out. Maybe because of this, in hundreds of tournaments that I've participated in it has been extremely rare for me to see any showboating . . . and the norm is respect for the other people you're competing against.
Camraderie, respect, mental and physical fortitude, and valuable real world skills are all integral parts of the sports I've participated in.