In all fairness to Lucy, I'm not sure it was a bad thing she did, taking over his businesses at the time? Isn't it a bit like people are given power of attorney over mental health patients?
Lucy is still a bitch, but he dd have a breakdown and disappear, leaving his 18 year old to raise a 5/6 year old and run what, three businesses? I would resent the fuck out of dad if he did that to me when I was barely an adult, no matter how involuntary it was for him. And it's not like he was the best dad to begin with.