If you have a problem with the Dota2 playerbase, simply use the "mute" button next to their nickname and you'll never regret it. Ever.
Just play the damn game! There's a reason why it's the most popular game on Steam, and will stay that way for a long time.

Don't let kids ruin your fun. Mute/ignore them, and enjoy the best multiplayer game created these past 2 decades. :)