I've really been struggling with this this year. Just had our first, in laws are perfect and besotted, couldn't be better, my parents and sibling really not interested at all. We have never requested childcare from them, wouldn't dare, but even when they visit they'll do anything to get out of time with our 1 year old, (including putting him in serious danger a couple times lying to us), and mother and sibling treat my wife like she's an expendable non-entity (due to a significant cultural difference). I don't need their involvement if they're not interested, I'm very, very sad about that but it's their choice not mine. But they consider themselves devoted model family, and tell family and friends we don't give them a chance to see him, and how hard done by they are, and we get choruses of attacks whenever we can get them on the phone, which our son sort of understands. My aunt's and uncles all think we're awful, their choice. But we'll spend a couple days getting a visit together, and they won't even cross the room to see him once in the whole day, preferring to chat over him with me about their latest pet peeve while my wife and I look after them and our son, then they'll disappear to the beach for the rest of the day. (we do live near a very nice beach, but I'd rather they just went to the beach than pretend it's to see our son. In fact I'd happily have them over as part of a beach trip, just don't pretend it's some extraordinarily devoted doting we should be grateful for). My father was angry and violent and never gave a damn, left very early on, didn't expect him to care. Mother and sibling disinterest much more surprising and disappointing. Childcare not the target, just some sort of relationship between them. Had my first hard Xmas realising how little they'd bothered (I had explained they needn't feel obliged, but that wouldn't fit their self image, so they bought the first junk to pop up under Amazon, and demanded i wrap it for them on delivery).
Really can't get my head round it. They probably had children later, they might have been the last generation who had children even if they didn't want to? There's also something painful about coming to terms with how much they hated parenting me and sibling (and being reminded how emotionally vicious they were, eg, when they instinctively hit our son for accidentally speaking above a whisper in a quiet restaurant), which has wrecked my ability to enjoy their company. Still really struggling with this.