That sounds very hard and like you did your best.
Giving your daughter her space, as much as she wants is the way to go IMO.
My friends sister has a situation not unlike yours.
Her narc husband upped and left and she worked very hard as a teacher to do her very best over the past 20 years.
Her ex-husband did Disney dad and undermined her all the way, throwing money at her two daughters throughout their teens and 20's, whilst her mother did all the tough parenting and providing of housing etc.
Her eldest was more like her father and hasn't always been kind to her mother and has gone periods barely contacting her unless she needed something, whilst enjoying her fathers money and always praising him to heaven for all HIS generosity to her.
Two years ago the eldest got married and her fathers +1 turned out to be with a glamorous woman that he was clearly mad about, totally smitten.
Since the wedding the father has now suddenly remarried and is no longer particularly interested in his daughters and his generosity has really dried up.
This has all come up because daughter is now pregnant, coinciding with her mothers retirement from teaching and she has said she was expecting her mother to CM for a couple of days for her.
She has been kindly told that it will not be happening in any shape or form.
Her mother is absolutely intending on enjoying her retirement.
My friend is so pleased for her sister that she has taken this stance.
She has been the best she could have been, in difficult circumstances and it has been very thankless with her eldest.
She is not now prepared to sacrifice her retirement looking after grandchildren.
Parenting often involves a lot of sacrifice, and most mothers do their best.
It is ok to say when our children harshly judge us, despite genuinely having done our best, "I accept your judgement and wish you only the best".
It is amazing how some harsh judgements clear quickly when children hit their 30's and gain some real life experience.
Wishing you well.