I thought even without backstory, we would have clocked Bruce as a vile individual - there were enough red flags to make bunting and it was clear that Ursula is abused by him as well as acting as his enabler and then inflicting emotional abuse on her children.
Bruce kicked off by complaining the nurses had the temerity to be looking after patients other than his son - he's on ITU, every patient there is as sick as Rob and they all have 1 to 1 nursing. His tone was aggressive and he was moaning about his other son and complaining Ursula was emabarrassing.
I deal with very distressed relatives every day and 99% of them manage to do it without behaving like Bruce. On that ITU everyone would have clocked Bruce as a twat.
He then had his extreme reaction to the stoma which was more about the perfection of his son being destroyed than the more usual 'having to have a bag', even though it was v clear the bag is almost certainly temporary. He didn't seem to see Rob as a person in his own right, more as an extension of himself.
And then he went off to pick a fight with Pat and Tony. There he was dragging Ursula around and telling her what to do and she was transformed into someone very meek except for her big showoff moment when she got to enable him and also grab some of the limelight back for herself for 2 minutes.
They were an awful pair and almost (only almost) made you feel sorry for Rob. I got the feeling Bruce was less mindgames like Rob and more physical violence, probably against both Ursula and his children, and they had all developed the mindgames to survive.