While I understand it's irritating im gonna try to explain what I think:
First i'm glad they didn't make "love" make all his grief magically dissappear. MC has lived with "living" corpses for more than a year, he hasn't had any contact with anyone else other than those corpses which were his only family left after his own family died AND those corpses were only like that because HE made them like that OH AND he did it not only because he didn't want to accept they died but also because he wanted to live, he didn't want to die (back in the second great dungeon). So yeah I understand he keeps going back to square one, that's a pretty fucked up past, he's not gonna over come it only because people were being nice to him
Second, i'm also glad the author didn't make ML magically change because of love, he's arrogant and controlling, he's someone who thinks that can control everything and everyone so yeah of course he wouldn't notice all the suicide signs MC was showing. ML has never loved anyone before so I understand he only realized he loved MC was when he realized he couldn't control MC and that MC would die (as he tried to off himself)
I explained it better in my main review here: https://www.mangago.me/home/mangatopic/21019810/
I'm dropping it, I'm at ch 71.....
The characters building is so slow i mean like there's only 95 chp and I'm already at 71 but what? The mc's back to square one! Yeah I'm not that patient as a person so this is a bit irritating, dont know if i will continue till the end tho