After 9 years, I've finally made up my mind and write a review about this game.

It certainly is fun, but unless you're going to invest a lot of time and effort into it, for your own sake, I cannot recommend it.
Reason being most players expect you to know how to play each gamemode, each class and each map. Basically, if you don't play well, most players get toxic very quickly. I do believe the situation in Europe regarding F2Ps is worse than anywhere else, but that is just my personal experience.
If you still want to try TF2, go ahead, I won't stop you. Just keep in mind, if you want to play it more often, you should consider reading guides, watching videos, etc. to learn more about each class, map, etc.

If you're looking for a competitive, class based FPS, you came to the right game though. The mechanics and roles of each class are more complex than what they look like and the amount of skill you have to put into each class is incredible. "Krit-Heals", "jumping someone", "being forced", etc., just to name a few of the many terms in the competitive scene

TL;DR
Good game with active competitive scene.
If you plan on putting time and effort into it, go for it.
Otherwise look elsewhere.

Edit(2k24):
Still would not recommend.