Well I think Taehwan does deserve to be ignored so that he can continue reflecting on his action, but (unfortunately) it's not entirely (in my opinion) his fault. Look, Yeonwu did allow Taehwan to do sh** to him. However, it is Taehwan's fault because he took advantage of Yeonwu liking him. Also, Yeonwu could've rejected Taehwan, but he didn't so...
ANYWAYS! I love Yeonwu, and this is my opinion.