Which poker emotion hurts results most?

Impatience when you're low on chips is a complicated emotion

All of the ones you listed are all harmful. You have to play detached, you have to play without emotions, you have to play for the sake of a good game, you have to play for the sake of the right decisions. No emotions, just clear calculation.

That poll is a tough one because, honestly, all of these emotions feed into each other.
@goodboycharlie, you nailed it with frustration. It's a silent killer. You often don't realize your decision-making has deteriorated until you've already spewed away a chunk of your stack.
@embaixador, I agree. Impatience is especially dangerous when you're short-stacked. The blinds keep coming, and it's easy to convince yourself that any spot is better than no spot.
@MishkaZL, I agree that emotional control is the ideal. The challenge is that poker constantly puts us in situations designed to test that control.
For me, overconfidence is the most damaging emotion. After winning a few big pots, I start feeling unbeatable, loosen up too much, and that's usually when I give everything back.

Entitlement is the worst emotion because it leads to the emotions in your list. Thinking I should have won-I can play any 2 cards vs these fish I am soo much better than them etc etc

For me, it's impatience.
When I go a long time without getting good hands or lose a few pots in a row, I sometimes feel tempted to force a situation that I wouldn't normally play. Almost every time I do that, I regret it later.

Impatience and fear.