Because she literally strung him along just so she could prove that there is no man that doesnt want her.
She was stalking him and made him fall in love with her, only to dump him the moment he develops feelings.
That's just cruel. If she wanted casual sex just for energy, fine, but she should've done it with someone else who wanted the same casual fling she wanted as well.
But noooo she wanted to counquer someone who wasn't all head over heels for her. It's immature and selfish, considering she knew the problems she has and that she wouldn't want to be serious with him.
In the end, just because she wanted to feel prove that she is "Oh so sexy and hot that no one would dare refuse her" she relentlessly bothered him until he caved in, spent time with her and in the end developed feelings, only for her to walk all over those feelings, spit on them and be like "Yeah no sorry I don't do dating" even tho she was the first one that started it all
Hmm why are some of yall dont like taeyi? I know for sure if taeyi was a guy you guys wouldn’t criticise her that much