It was good until the ending came

At first i really liked it, the acting is perfect, and so is the plot, but as i came to the end, it kind of went down from it. shortly i wont really think to rewatch it, it is sad that the end ruined the good of the story. by the way it is my opinion and there are probably people who will think different from me.
p.s why does it have to be 500 words ????helppppp