I don't even loving get why people who paid for it are so angry.
Valve was generous enough to make it free for other people, and now they can have it.
You shouldn't feel ripped off because the game is valued at $20, but it's free because Valve aren't in need of that extra cash.
You should be happy for the many people who can't get it who can play and enjoy the game now.
If you're so worried about overpopulation, look for a laidback and quiet server with a nice community.
The rest of your worries are probably bs that will appear on a very minor scale, and you just said them to add on to your complaints.