Okay, a couple of situations that can only happen to me.
My connection is nice and it should work, but sometimes I start a round and I get this sign in the middle of the screen and I can't move anymore. I always had the chance to use the scoreboard to move around and hide somewhere, but now that doesn't work anymore and my enemys have a chance to kill me multiple times in a row. I leave the game, because there's no reason for me to stay and then I look at my connection in the multiplayer and it says that I have five bars. What's going on?
My enemy manages to shoot me through walls, but I don't know if that's only my connection or if he's the one lagging here.
Someone has just activated a rocket as kickback and shoots me while I'm able to melee him, but he survives that (I didn't melee).
I meleed someone before he used the rocket, but the game says that he suicided and killed me with him, but whenever I'm the one who does that, the game says that he killed me with his melee.
It's hard to explain through words, though. It's like, if you can dodge it well, you won't take damage.