Just as the title says what is (in your opinion) the worst thing about your favorite game (or just any game really)? For me, I hate how quickly engineers can upgrade their sentries in TF2. Almost all the time as soon as I get in the enemy base at the start of a game to steal the intel their is already a fully upgraded sentry ready to one shot my pyro. I really think they should make the sentries upgrade after a couple kills rather than just getting metal and upgrading them cause engies always build near the restock room to get more metal easily.