I don't know the specifics of what we can remove, but if we could remove patches I would remove the Righteous Bison nerf. I loved using that weapon and now it's awful. It was never overpowered, and the only reason they nerfed it was because of a "bug" that they removed, even though that "bug" was actually intended and even showed up as a tip on some loading screens.
Easy. Darwins shield. A complete terrible weapon. Hard to beat an enemy sniper because you only deal 143 damage. This can be really agrovating on things such as 2fort. They can just keep on going back and forth. And it just can get so hard to beat. Oh and whoever wears it taunts after kill...
The Halloween Restriction on the older Halloween hats. Let me use the hats I got Damnit Whats the point of hats if I can only where them for like, 12 days?
Hats, betting sites, use of the word "profit" (news flash: you don't make profit off tf2), friendlies, and the whole pay to play thing.
I have already posted but Im going to say another one. Random crits. Completely unfair game mechanic. I don't even feel good when I get them. Its just like if your going to get one, your guaranteed a win.