@Bladestone
This line of reasoning I can accept. It makes sense and is quite rational. However, tbf, both Joonwoo and Taeyang have equal parts blame for the misunderstanding. In the same way Taeyang didn't trust his friend, Joonwoo did the same. Remember, Joonwoo thought that Taeyang broke his promise that he wouldn't interfere with Yuri and when they confronted each other about it, instead of trying to talk things out and being civil about it, both of them took aggression with each other... Unfortunately for Joonwoo, he overestimated himself and underestimated Taeyang...
Still, I'm not making any excuses for Taeyang. As I've said, Joonwoo has every right to be pissed, but he should acknowledge that things are only where they are now because he's to blame as well. Pretty sure if the Joonwoo now (this chapter) was the one dealing with Taeyang back then, maybe they would've settled their problems then and there.
@Koyomiya
Nah, that still won't fly with me. It's not to say Lila was the only one who helped or tried to help Joonwoo. It's just that she's the first one he willingly accepted help from. Hamin, Yuri, Taeyang (to some degree) and even the dick class prez have extended their hands to him on multiple occasions, but he was such a defeatist back then that he perceived anyone trying to help him as people who'll deceive or betray him...
Oh the irony. To put so much faith into someone whose betrayal could've left him hospitalized or even crippled and turn down two girls who genuinely always looked out for and have protected you on multiple occasions. No amount of reasoning can justify Lila and make me sympathetic towards her.
I've already accepted that she'll be redeemed at a later juncture, but that doesn't mean that I have to like her. She has to give literally an arm and a leg to save Joonwoo from some dire situation for me to even think about considering that.