Couldnt wait for it to end

In my opinion i think it has too many plot twists which made the whole thing confusing and watching it was so frustrating. I only continued watching because many people said it was "so amazing and underrated" apparently its not underrated, its not so popular as other korean dramas for a reason. And it became one of my kdrama regrets honestly, i shouldve dropped it. The ending was anticlimactic and boring? i started it so i can enjoy a good thriller instead i was just stressed out the whole time because its so confusing.
The acting was great though no complaints.