Responses
I was thinking the same as shown in the backstory he really did love her, he was good to her he fought for her got beaten but I think his frustration from his unstable professional life made him like this, plus he know Haesoo has no family to go back to so he took her for granted.... But still can love fizzle out so fast like that.....
Young Mincheol makes me so sad because he was so in love with her and if he saw how he was with his wife when he got older I think he would have killed his older self