I was excited when the series began but somewhere down the line, the Wayu-Thanu-Phai triangle became too chatoic that I had to watch their scenes at 2x. Wayu, even from the initial episodes seemed too clingy and dependent (not a bad thing but not very impressive either). I had no interest in Thanu until Thanu-Phai began. I started shipping those two because they both seemed mutually attracted and then the whole fantasy sequence played. I was okay with Thanu taking care of Wayu out of responsibility and sympathy but then the makers decided to play the fantasy element for these two as well and that actually ruined the fantasy connection between Thanu and Phai. The whole scene where they realise that it was Thanu and not Pha who saved Wayu and hence it was Thanu and Wayu destined to be together felt the stupidest. I mean, just because someone(Thanu) was supposed to be in place was somebody else(Pha) does not mean that you were supposed to love that person (Thanu). This completely disregards Wayu and Pha's love and relationship as if there was nothing to their relationship and Wayu would have loved anyone, literally anyone who would've been good to him. But this also seemed correct for Wayu's character as all through the series I just felt that he was just desperate to be taken care of, initially by Pha and then by Thanu.
I actually want Wayu to reflect and work on himself before being in a relationship, and if he is to be with somebody it should be Pha and not Thanu. People are complaining as to how can people ship Wayu with Pha when Pha was missing throughout the series but that's not actually true. Pha was very much a part of the series, more than many other characters even though he was physically absent. The action was moved forward because of Pha at several occassions. And the reason behind Pha breaking up with Wayu never seemed to be falling out of love but some unavoidable circumstances.
Also, I don't think Sandee turned out to be evil in the last episode because it was nowhere evident that he had some ill intentions. I believe he just wanted to help his friend Phai.

In the Wayu-Thanu-Phai triangle, the youngest was somehow more mature than the elders. Thanu was so indecisive that I actually disliked him for this and Wayu was too clingy and dependent to be liked. I hope the characters work on themselves in the coming season coz if they are this immature they are definitely not likeable.
P.S. The main couple Mark and Kit were good throughout and their relationship progressed well, even though they had less scenes in later episodes, but it was unavoidable since they had multiple stories and characters to deal with.
-Personal Opinion