The actual thing that happened is ludicrous. It's use as a whole is some MOST TRAGIC BACKSTORY EVER levels of ridiculous, especially when the tone of the show does not remotely justify this kind of thing. Although that's not really a new problem for this series.
Spoiler: episode 3
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Not only does that guy had to have been on some crazy drugs to just keep getting up after getting shot twice, but the recoil on that gun is going to do way more than kind of make her swing it upwards, and she apparently has magical aiming powers to have managed that headshot at the end.
Like, he couldn't have just gotten shot in the struggle and died, because that wouldn't be EXTREME enough. I guess.