You can see in comparison that the young top is so immature and can't control his lust ,& emotions at all. Yes, the old guy is a perverd, but has a steady personality and job.
Juhyeok is dealing with his own problem how is he supposed to fall in love with su-bumass when su-bumass never respect his boundary and throwing tantrum like a man child didn't even let Juhyeok talk for himself.
im not defending ml all characters are annoying
he def tried to assault mc tho
juhyeok doesnt love him even a bit and that old guys adds nothing to the story why is he even there