Fun fact he was Technically a WW2 Vet not a Korea Vet he was there as part of the post War Occupation Force, that was distinct from the Korean War he left several months maybe a year before the Korean war got started but there was action against communist insurgents, but he was also part of a Comms unit and didn't see any action that we have found.
Chris doesn't like anyone who doesn't constantly pat his arse 24/7 bob was the one who was inclined to tell him to cut his shit, and he seemed genuinely broken up about Bob and every time he talked about him after he died. Chris wasn't close to him but he did care for him in his own way.
David seemed distant but not outright hostile towards bob, he wasn't as close to him as Chris was later in his life post divorce but he wasn't willing to cut bob off if he tried to talk to him but he wouldnt be the one reaching out, so a strained relationship but not a total absense of one.
Carrol does seem to hate him, no idea why I wish we knew why and it's gone beyond just Bob and extended to Chris and Barb - and Barb wasnt the cause for the divorce she met him a year or two after the divorce was finalised.
I don't think Bob was a saint far from it but I do think he was better than some give him credit for and worse than how some others view him.