If you're gonna be spilling facts, you gotta say it a little louder for the people in the back
I wish I could but unfortunately most of them will ignore it. It's annoying to see people hate on Hyesung just because he's not as assertive as /they/ hope or want him to be.
They also ignore the fact that Hyesung was abandoned by his own mother and was never shown/taught how to express himself properly until he met Dojin and his family, or never experienced this type of affection. He's already trying hard. He doesn't need any additional hate. He loves his man and kid. He just doesn't know how to show it in a more "socially acceptable" way.
Not people wondering if Hyesung really likes Dojin. He does. He just doesn't show it because he's a stereotypical old-time tsundere, which is annoying for a lot of people. (Used to read a lot of mangas with tsunderes so I'm fine with it.) Also, his upbringing is another thing to consider why he's bad at expressing his feelings.