Look. This game is 13 years old, and i have played it since 2011. The game isn't in a perfect state with Valve not really taking the best care of it and at the moment there are plenty of bots trying to ruin the experience of others since the scource code was leaked and so on.

But the game is still kicking and is still the best and funniest game i ever owned. It's really a magical experience and there is no game that plays the role tf2 does. It's truly unique, all from the 12v12 format with 9 different classes to pick, to the goofiness of the amazing customization of the classes.
Oh, 9 classes aren't enough for you? Every class has unlockable weapons through crafting, achievements and random drops from just playing the ♥♥♥♥♥♥♥ game. There are probably over 1000 different loadout combinations but i'm not gonna count.

Also change your characters appearance with cosmetics and hats to make them edgy and dark as a supernatural ninja spy or make yourself a unicorn as the adorable pyro, Whatever suits you.

If you got this far, just download the game and play it, with enough patience you will find out that the game is truly a wonderfull mess.