MAJOR SPOILER I WAS JUST SO ANGRY

So, I've watched this around late 2021. My mom was diagnosed with cancer, and I was looking for some soft, sweet kdrama to watch and this seemed to be just it. That is until I got to the finale.
As I mentioned, my mom was diagnosed with lymphoma and was hospitalized around the time I watched this. So I bawled my eyes out when they decide to kill the main character, just to find out 20 min later, in the final like 5 min that the son of a great mother was freaking alive!! I didn't even know how to feel.