What the--
So he WAS abused by Agatha and didn't think the same would happen to his son, even though his brother-in-law has also been saying terrible things about Abel??
I dunno if the MC would wave this away by "poor writing by the og author who meant for this dad to die in one year" but honestly, he's a strict, "monster" duke, why would he not have a firmer hand on his estate and have an ear to the ground about his son being treated poorly? He has agents who learned everything about a woman who was giving his son gifts but doesn't have any agents watching the state of his home?
Just seems like a strange weakness for a man who is supposed to have so much power. Like, a man of that authority can't watch all of his estates by himself and he obviously has a good information network, but seems to think nothing can happen in his home because he lives there? He really is a narcissist lmao...he's got thicc pecs but an even thicker skull...