One of the things that bothers me the most about tf2 is that it is so much different than what it used to be. There are so many weapons and hats and new themes that it all just appears incredibly noisy and unneededly complicated.
Tf2 is supposed to be a simple game. When you see a class, you are supposed to know within a second what threat you are going to be dealing with. Now with all these different loadouts, it becomes a little harder to do so. Now, I want to clarify that for the most part this really is NOT an issue. But there are some specific things that really irk me about this game.
1: Demoknighting. I find it fun to sometimes run around and chop heads off, but if it were up to me I would completely remove the shields.
2: Minisentries. Sure, we all hate that they are quick to build and require very little metal, do as much damage as a level 1 sentry and have a small hitbox, but what pisses me off more than anything is that you can stick it in a location that would otherwise be impossible to get a level 1 normal sentry into. It changes how you can handle a situation and often leads to people having to fix an otherwise perfect layout.
3: Pointless upgrades and/or gimmicky weapons. Some weapons have straight upgraded stats or are just so good that the stock weapons seem useless, which is a real shame because they all have a beautiful design.
4: Clashing personalities and styles: Why does the heavy have so many hats to begin with? All he is supposed to care about is his minigun. Oh, and he isn't stupid. He just speaks broken English because it is not his first language. And why does scout wear anything that isn't baseball related? And why does he have several modern-style baseball caps? And since when was soldier ever a conquistador? Why does the spy wear a hat on top of a mask? Why does the sniper have bunny ears? Why is wheatley in TF2? This list goes on and on and on; there are so many inconsistencies among the characters. This is supposed to be a simple game. At one time it had a theme: post-war United States industrialism represented in a playful but serious tone inspired by impressionism and propaganda. Why in the world is there a map in a 1980s industial Chinese city? (Not to condemn anyone-I still love the map)
5: Weapons that cross the specific class line: The short-circuit always bothered me because it removed projectiles from the air, something that you could accomplish just as well as by asking a pyro to airblast them away. The Huo-Long_heater causes burn damage that was most likely designed so that a spy could be easily located after backstabbing the heavy. It certainly was not needed, that is also the job of the pyro. The black box allows a soldier to heal himself simply by dealing damage. He is now being rewarded for something that he is supposed to do anyway. This list goes on and on, but I think you understand the point that I am getting at.
I know a lot of people disagree with me, but I just absolutely adore the individuality of this game and it pains me to see it so butchered by things that don't belong. Unfortunately, the game is influenced by the community and many fail to understand how brilliant the original design of this game was. Each character was thought out so expertly, to perfectly balance one another and bring something new to the battlefield. Instead of a class-based first person shooter, it now exists as a role-playing-game, where the player can turn each class into something that he or she wants, whether its personality or play style, and it makes me sick thinking about how much work went into the original designs that no one cares about anymore.