He doesn't know how to express emotions
his father is a very good person. And this is the only seme that is not a red flag from the author
His dad lost his ability to feel emotions and is dependent on his dominant omega partner. His partner comes first, no matter what. Pheromone accumulation caused brain damage, now he has to stay near his dominant omega and his pheromones for the rest of his life to not worsen his condition.
He also has trauma, he is afraid that one of his children turns out like his own dominant alpha father. He never wanted that many children.
Oooh that kind of explains why he was emotionally so cold but still tried his best to comfort his child by saying he will buy another bird for him. I wonder where his other dad is? I mean I can't expect the story to be all happy since it needs a driving plot to build up an entire Universe. But that's so cute that he prioritize his partner over anyone even children
The story of thr grandparents is dark.
I just wrote something on what you ask on another comment
https://www.mangago.zone/home/mangatopic/20027527/
in the last ~ third of my comment.
Is his dad OK?? Or is he twisted like the rest?