I really liked it! Probably one of my favourite series featuring gay relationship(s).
From what I know hazing is part of their culture. I can understand why (the hazing) it seems rude to you. (Oh wait, did you mean Arthit? Because yes, I did find his ˝punishments˝ for Kong unprofessional as hazer, but we all know his reasons behind doing so, right?)
To me I really like that part of their culture, it's a way to get to know your seniours as well as learning to respect them (as well as your 'classmates'?)! I wish it was like that where I live, we don't even get to know our seniours once we're in uni T.T