Your not a parent... which tells us everything.
Imagine talking completely out your ass so confidently about something you have zero life experience of and doesn't apply to you.
Parenting is 24/7 every day for 16 years. Its the hardest job you will ever have, its shake the very core of who you are and you lose all identity, autonomy and self care for long periods of time. Studies have show it has devastating life long effects both physically and mentally changing bones and brain function etc... People develop such bad depression (which isn't even rare) that they can end up killing themselves or having complete breakdowns (which they sometimes never recover from).
At 23 they have done MORE than enough. They do not need to spend 24/7 wiping the arse of an ungrateful able bodied adult who doesn't see why they should respect their parents as people.
They aren't stopping being parents they just want an adult to be an adult. If OP phoned her parents at 1am from her OWN place and said she was scared/in pain/had been attack/was going to hospital etc... I bet they would drop everything to rush over. Thats the kind of parenting you get in adulthood not spending everyday having to come up with a plan to entertain them like they are a fucking toddler (and doing their basic life admin because OP had deliberate refused to answer if she does ANY chores at all).
It does not on any planet mean they are bad parents to want to be people again, they are not ditching duties or didn't want kids... it means they unfortunately got a selfish brat of a kid who is a abusive manipulative user with contempt for their generosity.
Also 18-23 is OP whole life, its her whole life so far which is all we can know as a fact on how long her life will be.