IMO, it's not their homos*xual relationship that is being regarded as disgusting. It's his action. The fact that he's married and do the deed while his kid is around then shut him out the door after the poor kid find out. That's what makes it disgusting.

The act of betrayal to both his spouse and kid, that's disgusting. It's understandable if he suddenly realized he can love Du Sheng. But it's unbearable when he just stood by as a bystander while watching his spouse running around trying to get her sh*t together and ignored the little kid as he bask in the halo of love between Du Sheng and him. He could've opt for a better option. Such as, divorce his wife first and then be a good father to the kid while letting the kid know that he's slightly different but he just have to go all scummy and leave the mother son pair to struggle while he enjoy his life with his new love somewhere else.

The fact that he realized he's scum but proceeds to act like one, all holier-than-thou, to gain his son's favor after all the trauma he caused to his son is also disgusting. Him being gay isn't disgusting. Ji Huanyu himself is disgusting. Along with Du Sheng that homewrecker that's supposed to be Jiang Ou's best friend.

So, it's understandable for them to think JHY and DS are disgusting. They just happened to be gay and the majority still finds it unacceptable at the time. If they take a different route, no one's going to throw the word disgusting to their faces.

for example when SW realized his feelings for JT so he decided to flunk some of his exams to get transferred to lower section. They're just sections apart, but they act like... ah, it would just make you sigh and say, "young love, indeed".

I wanted to punched the parents. Why nobody said anything about the selfish, neglectful parents??

MC's dad for neglecting him, for saying such hurtful things to him, for never hearing his sons words, for being such a selfish parent.

ML's dad for leaving him, for traumatizing him, for going to his school just to drag ML to the mud too, for outing the ML and ruining his life when he never even in the picture in the first place. Why did you even came in the first place? Just to ruined your son? The one you left? What a shitty dad.

ML's mom, who never even raised him, for making a sad dog face everytime and making him guilty when it's actually her fault as she never been a mom to him, for trying to compensate poorly, for ruining her son's once in a lifetime perfect birthday when she probably never remember before, for being a homophobe, for breaking them up. Just stop trying to be a mom when you're not ready. Heal yourself first. Go to a doctor.

They're separated for 6 years, but those years are summed up in just a chapter.

like how MC fails the sciences in the first tests because obviously you cannot score good in one night. And how in the higher competition levels of the Olympiad the MC says that no matter how good he is at studying he cannot compare to geniuses.