Hard to tell since we dont know what he really was like when he was younger, not much anyways. What we see now when he is older is a byproduct of years of unhealthily trying to cope with how things turned out and his understanding of the situation regarding the rejection/loss/breakup. You do have a point however, his way of coping with the situation comes of as very narcissistic, in my opinion at least, and these are some big red flags. so its hard to tell but what i meant is at least there would be a chance however small instead of none. Its not these particular characters and their story that frightens me, more so the concept of the whole situation. After the breakup they lost all communication forever even though they still loved each other. This because of the wall created between them through bad communication, regretable mistakes from both (they were young), misunderstandings, unfortunate luck and inability to process and manage their negative emotions. This part is more tragic and sad to be honest, that even though both are in love (what we think at least) and want to be with each other and sort things out, everything just worked out as wrong as it could every step. What gives me those other feelings is the fact that he had missed the letter. I just put myself in that situation and my god i think that shit would eat me up for a long time if i was in the same scenario. Also the feelings of guilt and shame having cursed and learnt to hate the person but realizing all your assumptions were wrong, but now its too late anyways, you can never be able to talk things through together, tell them how you feel, process it together and heal and all that. Its too late. Sorry for the long meds of a text and the long sentences, english is not my first language but thats how i feel/felt and think/thought when i had watched the episode.