Specifically, I'm talking about the PvP achievements, such as "Defend 50 towers" or "Defend 10 bases" or "Disarm 5 bombs."
Each of these achievements requires you, personally, to be the one to complete the defense/defuse cast to receive credit. It doesn't matter if you were channeling when someone else finished - you don't get a shred of credit. And there are other examples - IOC has two examples, where you need to personally pilot a vehicle ("screw you, vastly superior pilot, I need this for my achievement!") and where you need to personally get the killing blow on vehicles ("If I attack now, I'll miss my chance to get the killing blow!")
Why are there achievements forcing you to compete against your own teammates to get them accomplished? Why aren't these achievements designed so that they reward teamwork rather than personal gains?