I think it's more laziness from Chris than it is disrespect, although there's some disrespect too.
He clearly likes to talk about his dad's love of music, and even when he was alive Chris would do things like include some of his dad's music on mix CDs or whatever.
But when it's not something to do with himself or his own self-aggrandizing projects, Chris can't be bothered to care about it. Even though there MUST have been a lot of valuable records in Bob's collection, and the collection overall could just have been sold in bulk for a lot of money to someone... doing that would require effort. It's like Chris would rather just get by on tugboat and pity donations. Bob's music collection was probably worth five figures, easy, very possibly even six, if someone actually wanted to go through it, pull out the valuable records to sell individually and then sell the rest in bulk even at $1/each. Over $35,000 easily, would be my guess. So more than a year's worth of income for Chris. Maybe more than a year's worth of income for Chris and Barb combined. At least, it's a decent possibility. And instead of investigating this, they just throw it all out. It's not even some weird annoying collection that was willed to them and they had no idea about. It was Bob's collection, and he told them that it was valuable. And they still just said "F it".
But can you imagine Chris actually taking the time to list, sell, and mail individual LPs? I can't imagine that. I definitely can't imagine him mailing them properly so they don't get damaged in shipping. I guess it was fucking impossible for him to do this, and maybe he realizes this about himself, intuitively and accurately.
It's just such a waste and such a shame. I'm a collector of certain antiques myself, and whenever I hear about something like this it really gets to me. If nothing else, his father would have wanted someone who enjoyed and appreciated the music and the history to have those records. Chris couldn't even bother to donate them somewhere.