Sorry this is a long un as I've been working it out as I've gone along...
I'm not sure I agree with the idea that someone can be incredibly, awfully abusive to their ex partner, using a child as ammunition and fire power in the fight to win against ex partner at all costs, year after gruelling year, not caring about the collateral damage done to that child in this war to end all wars... Yet when it comes to the child, oh, that parent is SUCH a good mother/ father.
Because they're not, are they? In the slightest.
You see it in posts on here from women being abused (physically, mentally, financially, socially, sexually, emotionally, take your pick), but then finish their posts by saying: 'but he's not all bad, he's a really good father"
Which of course, he's not.
You cannot abuse one person, and be a super good person to another. Or be an excellent person and role model to one person, but an evil sadistic torturer to another. If what's happening is really bad, then why do you think they'll be able to lock all that inside for another person?
And when that 'other' role, is being a parent, I'd say it's pretty damn important if that 'good parent' actually thinks nothing of using the child in their care as 'leverage', or a tool to manipulate and trick and coerce into being cannon fodder in this war... that person will be doing harm to that child.
Just because it seems quieter to let that parent 'win', and walk away... How can you think that person who has behaved so terribly will behave to your child?
Children push buttons. Children are inherently annoying at times. Children can be selfish little creatures who cannot see that mummy/ daddy is tired, that they're trying their best but right now they need quiet! And children don't care if your're late for work, they just want the zebra socks and waahhhh... Basically, children are annoying and if they're with someone who abuses others, how long before that creeps out into the parent-child relationship?
Or perhaps they'll 'just' teach your child to be as manipulative and cruel as they themselves are. Abuse in a less direct way.
Either way, I'd be fighting like hell to stay in my child's life, to help that child, to give that child another parent. Because they need it.
And that's why I couldn't give up fighting for my child, against a parent who behaves so cruelly (abusively?) towards me.
NB it would be different in different situations, such as when the parent fighting for access is abusive or unsuitable to be an active parent. All the scenarios we're talking about on this thread are based on the child being resident with a parent who is deliberately blocking access and using underhand and harmful strategies to ensure the child doesn't get contact.