Well it is. That's exactly what it's about. The OP feels she did everything with very little support from her DH let alone the GPs. That has stuck with her and now she's digging her heels in
But not getting support isn't really a reason to deny the grandkids the experience.
Of course she doesn't need a reason, she can do what she wants.... But, why does she get to choose? The father has parental responsibility too, if he wants to take his kids to visit his parents overnight, why shouldn't he be able to?
Likewise, you couldn't break up with the DH and say "actually I don't think the kids should stay at your house overnight because when they were babies you barely helped me at all" as she said he barely helped either.
Yes, it's different because the father would have a right to see his child, but the feeling would be the same. "You don't deserve to spend time with them".
And what if the children did enjoy spending time there and bond really well with their grandparents? Would it really matter that they weren't so involved when they were little babies, as long as they are creating good memories for the children now that they will remember forever?
I'm NC with my own mum mutually, she didn't want to meet DD, her first grandchild when I was pregnant. DD has never met her. But, if she changed her mind, I wouldn't prevent them forming some kind of relationship just because I have my own resentments, or because she wasn't around when DD was a baby. I don't believe parental resentments should impact on the children forming their own relationships and opinions about their family members, unless there are safeguarding issues etc.
I just can't understand it. DP was the same. "I don't want DD staying at my mum's because I don't like my mum much" (because she had bfs when he was young, didn't have a lot of money, 3 kids with 3 diff dad's because he could be nasty like that...he was a troubled teen and got kicked out when he was 19). It was like he was trying to punish her... But didn't see it was also sort of taking away from DD too. But I fought for DD to at least know one grandparent, and she adores her paternal nanny so much and loves staying over.
Don't put your own issues onto your kids. They are different relationships.
You don't want them to stay over because you should reap the benefits of your early work with them... But what would you miss? A bedtime movie and some bedtime stories, one night of cuddles? You wouldn't still get that 99.8% of the time or whatever, depending on how often they wanted to go. It seems petty to insist you need them 100% of the time to make up for your maternal sacrifice.