@Milkthecow YANBU at all!
However...
This is a bit of a double edged sword.
I know a few people whose parents died before their kids were born OR whose parents died when the kids were very young (like under 5.) OR they just simply had no relationship with them.
Basically, as has been said, life is definitely easier with young children, when you have parental support. And GOOD support, not parents or in-laws taking over, and judging, and telling you you're wrong in everything you're doing...
I have heard quite a number of people say they felt envious and bitter and even angry that they had no support, when they were seeing people around them dropping their kids off at the grandparents from Friday afternoon to Sunday evening, and having the grandparents around helping them look after the (grand)kids, and taking them on shopping trips, and daytrips to the beach.
They even go on holiday with them... (And look after the (grand)kids whilst the parents go out for the night, and then let them have a lie-in the next day...) Or they look after the grandkids while the parents go off for an afternoon. It's natural to feel upset and bitter if you don't have this with your parents for whatever reason...
As has been said, I don't think people realise how much easier their life is when they have good, strong support.
But there are 2 sides to it. Some people who are just alone (or with their partner and the kids,) with no family support; often end up with a much closer relationship with their children, than the ones who spent half their life at granny's, or auntie Lisa's, or grandad's house.
They also often end up less spoiled and better behaved, because they didn't have grandparents letting them get away with stuff, and undoing the work/rules the parents had done.
In addition, the people who have no parental support with their kids, (often because their parents died before the kids were born/when the kids were young,) don't have the stress and worry of looking after elderly parents.
Many people who had their parents alive when their kids were growing up (and got that support,) get to middle age, have teenage children, and now have elderly - and sometimes infirm - parents to look after. The sandwich generation they're called.
Middle aged parents (usually WOMEN,) are expected to run around after the teen/adolescent children, look after their own home, hold down a job, AND look after the elderly parents, and sometimes the in-laws!
So the Universal balance restores itself. The people who had no help with their kids when they were young, (coz their parents died, or their parents didn't give a shit and they now have no relationship with them,) can sit back in middle age, and watch their peers (who they were so envious of,) running themselves ragged, being a servant to their (now) elderly parents... And they will expect it after being an unpaid childminder to their grandkids for a number of years!!!
So it may seem hard now, but just sit back and wait... Your time to relax will come.
Many of your peers who have all the parental help now, will be run ragged looking after them in 15 years or so!!!
I do have to agree with a pp though, that you shouldn't depend on them to look after your children all the time, or blame them for having to give up your career! (As one poster did!) But some support when you need it, and taking them on picnics and day trips, and giving you a break now and again, is just a decent thing to do. 