I don't like this new trend of bringing unnecessary violence that has no place at the end of romances, with scenes that could impress very young people. A romance must be accessible to a wide audience.
Furthermore, as I found the beginning of this story a bit chaotic, I quickly watched the ending that I didn't like. I wouldn't have wasted my time rewatching the last episodes.
However, I liked the actors who did their best with this bad story.
Finally, to have a good OST, you need emotion, depth, and there was none of that here.