@boolut, you sound quite breezy about the challenges of parenthood in difficult circumstances; "you just get on with it".
I think this can be problematic so would like to add:
DC spilt juice all over their top seconds before going out -you just get on with it.
DC loses their temper at the supermarket checkout ‐you just get on with it.
DC crayoned the wall -you just get on with it.
A parent whose DC "is difficult... doesn't eat well, doesn't sleep well, has behavioural or personality disorders... disability" definitely has no choice but to "just get on with it" but it's on an entirely different level.
For many, it persists into their child's adulthood and involves losses and sacrifices the parent had never imagined at the moment of considering whether or not parenthood is for them: marriage breaking under the strain, parental mental health nose-diving, livelihood up in smoke and career ended, your home modified, or trashed, or feeling like a prison, or becoming the workplace of carers and allied health care professionals, or no longer affordable.
And the constant scrambling to ensure one's child's needs are met in a system which is chronically underfunded and under-resourced.
The ever-present worry about what the hell their future will hold and how it really is all on you, as your child will not necessarily be making those decisions for themselves.
The hurt when they're hurting; whether because their environment is unbearable on a sensory level, or because their EA is occupying every waking moment, or a cannula is taking ages to fit, or because there are invisible germs everywhere in your spotless house, or because school has become unmanageable.
Few of us imagine ourselves parenting in challenging circumstances in perpetuity, or have any idea of whether we'd be equal to the task.
This is what I would ask anyone pondering parenthood to consider.