Given that I have experienced quite a bit of similarities to Yotsuyu's life, I would do the same when presented with the monsters who did what they did to me. Not to mention that she had Asahi whispering in her ear, gaslighting and manipulating what he wanted out of her in order to then have her killed by the WoL.

She was wronged. She was beaten to the ground and left to rot, and the seeds of despair wormed their way through. There's a reason Fordola and her have gone different paths - people faced with trauma, heartache, destruction channel it in different ways.

She wasn't always Tsuyu when she was playing Tsuyu, you know? She remembered. She wanted to leave because of her guilt, her sadness. She didn't just leave to go do bad things - she left because she thought she was doing something good and she didn't want the person who showed her kindness (Gosetsu) to feel disappointment and anguish when she turned out to be Yotsuyu instead of Tsuyu. She was a person who tried to do good and was manipulated by the world around her into bad.

So what if the town wasn't at fault, if Doma wasn't at fault? The systems in place still allowed for what happened to her to HAPPEN.