Getting into a game alone which increases the risks of getting dumb team mates.

When you eat dirt for the first time and leave your family to build a shack in the woods

Whenever a person queues for a game in a ranked online game such as League of Legends or Counter-Strike: Global Offensive alone (as opposed to playing with friends or friends of friends). People who do this typically run into the issue of having incompetent teammates or going up against a premade opposing team.

Going into a online game lobby and matching with random players from internet. Usually ends up having disabled people on your team.