I actually understand touma's feelings and don't blame him. But for Kou yea what he did was frustrating . But you have to understand that when Kou saw narumi he saw his past self. And he couldn't just leave her alone knowing she's going through what he went through and she had no one, also with narumi manipulating him it was hard for him. Later he learned that no matter how much he wants to help narumi, he just can't let her happiness base on him and be her pillar, she has to find that herself . Since his mother died he had a hard time loving anyone or anything in fear of losing them. So when he finally come in agreement with his past he leave to chase after futaba and his happiness . Also when he made up his mind he didn't even know that futaba had a bf. When you're dealing with trauma there's a lot of healing phases even when you feel like you've finally healed small things can take you back. And you can't expect people to just react the way you want. What's most important about his story was that he came in terms with everything and he is now learning to love again.
TOUMA DESERVED BETTER. That's it. Why tf people blame him? Yes he knew Futaba liked Kou but wouldn't you pursue the girl/boy you like if you saw her sad every fucking time? Kou went through a lot and has trauma okay i understand BUT why he decided to pursue Futaba when Futaba and Touma started to dating? Yeah, his little ass couldn't accept Futaba's moving on. Where were you when Futaba chased you? Aah, you kissed her and then pushed her again. I'm sorry but his trauma isn't an excuse for everything he did. People make him literally sad angel boy and blame Touma. He manipulated her bla bla bla. Bullshit.