I would call the ending trash but that's me being biased because I kinda stop paying attention to the episode after what happened to my favorite character, but to be honest it was overall pretty disappointing. I was hoping for a big final battle with the antagonist and it was meh. They had 16 episodes to build it and it ended in like 5 minutes I think? or at least that's what it felt.
Back to how they wronged my favorite character: why would they give him a family, a will to live, only to snatch it out in a snap??? And maybe I'm just dumb and I should've known with all the years I've been watching kdramas of what to expect about his ending but i did not see that coming AT ALL. I guess it was necessary for the main characters to have their happy ending but still...
I loved the plot, the casting, and the acting but idk I'm still hurt about the ending. It's worth watching it but I don't think I'll rewatch it anytime soon.