I know we don't like Mincheol (I also don't like him), but I do find it interesting to see his and Haesoo backstory. Like how did they get to this point compared to how in love they were in their youth.
Like all the flashbacks has just showed how caring and in love Mincheol were with Haesoo, and seeing that I understand why she had such a hard time with just letting go of their marriage and everything they had.