The synopsis for this isn't entirely accurate but I won't re-summarize this as others have already.

I really hate the ML and his friends. Like attracts like and the ML's character is just so off putting. He is clearly blinded with revenge that spiral from his mother's death. When it looked like he has resolved his feelings and is moving on, he's actually not and has another revenge scheme. He's stupidly handsome but his fixation on revenge got me not liking his character at all. Very pysco-path like. He does have some redeeming qualities but overall, Kiew should have dropped him and walked away. He does not deserve her at all and personally he should have grovel a lot more and not easily forgiven.
And going on the topic of "like attracts like" Kris was not much better. His character is equally pysco-path like Peat and maybe even more so. If I was friends with Katha, I would tell him to run, drop these clowns they're gonna kill you in the amist of trying to either get revenge on their own family or on each other.

Chaya.. I also feel really sorry for her. At first my impression of her character was just stubborn and refusing to move on, but in reality she is just a girl who is blinded by love and being (eventually) being lead on. She was used in Peat's plan for revenge and he did not care about the feelings of his friends.

One thing I got to say is I really enjoyed the OSTs that played throughout the lakorn. They are spot on and really get you in the angst/heart break.

I've seen some people compare this with Ch7's Panthakan Rak. The similarity between the two is that both ML are set on getting their revenge against the father's wrong doing to their mothers. (Also their father is not actually their father). Tra Barb See Chompoo is definitely much dark, more angst and a stronger revenge theme than Panthakan Rak. Panthakan Rak storyline is lighter (in comparison).