That I am acting "tougher" then I am, and would in reality be butthurt if I took the Anathema flaw and an Imperial was clever enough to exploit it.

Fact is, I'm shit enough at PK that I learned years ago how to deal with an unfun PK. Or one where I sucked. Or one where I didn't have a chance. It's part of the game. You can believe it or not, but if I were the level 6 anathema, I would have just tipped my hat. If there were some mechanism to allow higher levels to kill any sub 10's, I'd raise my eyebrow as well, but this player specifically took a flaw, maybe for the RP, maybe just for precious edge points, and flaws have consequences.

I kind of feel that the complaining about this is similar to people complaining about thieves using steal, which I have also rolled my eyes at.

Last thing, there's an argument to be had about whether this was unsportsmanlike, but it was in no way shitty RP. An Imperial set a trap to kill an Anathema. He succeeded and celebrated. That is NOT bad RP.