Freshmaker
I am Korean.
I'm not sure what Theon was even suppose to do in that situation. There's no way he could save Yara if Euron actually intended on it, his fucking axe was to her throat. All attacking would have accomplished is getting one of them killed needlessly, and now they're both alive. Sounds like Theon made the right choice to me.
Now he gets to meet the Drowned God.