Well the post can be interpreted into many things depending on your view but the fact remains that some people take things way to seriously and that has a impact on a lot of races.
On the other hand how are you suppose to learn if you drive with some people who can't handle the occasional mistake and then you get flamed?
Well, as an adult, you have to learn to cope with things that are inevitable.
e.g
In racing it's inevitable that accidents will happen. Inevitable. They happen. In every race. "Clean racing" is a fantasy.
In life it's inevitable that someone will say something to you that you don't like. Moreso if you are in competition with them. But being called "children" only ever bothers children.
It's inevitable that your own crashes are "mistakes" and other peoples are "taking it too seriously"
In racing and in a game it's inevitable that people will try to win. It's what "racing" and "game" mean after all.
So you have to learn to cope with each one. e.g you shouldn't spend much more than the time taken to do 1 lap to qualify, anything else is learning to play. Except Nelson Piquet, who waits until they're qualifying to learn? Do that offline.
You shouldn't pay any attention to what someone says. Simply don't read the type And things like teamspeak is a waste of time, no one has ever said anything interesting, vital or worth listening to in a none team game. Ever.
Imagine if Hamilton is sat there talking to Jenson "Hey Jenson, your new girlfriend's ugly" "Bah, Lewis, at least mine can sing" and so on...it'd be a farce.
Similarly for accidents. You have to learn to avoid them, or, at worst, minimise the consequences of them. In that vein playing on pub servers will arm you better. If you can win there, then you'll win easily when you go back on a server where folks are scared of big boys on the park kicking the ball too hard.