I used to get upset, especially when my team or the opposing team found out i was a girl and would intentionally gang up on me (more in battlefield, but there are some not nice people in tf2 as well). But, ever since i joined eGO, i've had very little problem and just try to have the best time i possibly can.
Yep, i still get super frustrated (esp when a certain sniper is dominating me INTO THE GROUND), but it's easy to chill out and be respectful on our servers since everyone else is too!
Also, i remember that i'm there as an example, so if i do get mad once in a while, it's very simple to turn it into a joke that the whole team can enjoy.