I like how you noticed that part. When Din was backing Fai against Jeed, ChaAim's non-verbal cue was like: Don't you dare. lol. So he stops and takes a different approach.
I know we've seen all of the brothers display anger in their own different ways, particularly as employers scolding their employees, and I must say, I haven't watched much of Fai Ruk Asoon, yet I think I can see why Boy was chosen for the pra-aek's part. He's quite scary. lol. Fai may be prone to anger, but his rage is more like a boy's tantrum to me. It's predictable. Din's rage is at least tempered by his fair judgment. But Wayu--he's exudes a more sharp, critical insight than Fai and then there's the difference that he's not as kind as Din...When he sees red, I..I think he's quite sexy.
Edit:
About the negative comment on Mint's forum, I believe it was only one person. The other members there and the administrator didn't seem to approve of that one member's behavior toward "MTEAM".