I am a child of divorce, my parents divorce was a great example of everything not to do. My mum won full custody of us, but a year later she left the country, didn't want to take us, and our Dad ended up a sole parent. We had sporadic contact from her for the next decade.
Stbxh and I have seperated recently. He is abusive. He's spent 6 months telling the kids it's not fair to HIM if he doesn't have 50/50 and that was what was happening. DD was really scared by that. As it is he gets 4 nights a fortnight but so far has never done more than 3 while telling our DC it's my fault he doesn't see them more. He moved and is now to far away to do any of their many after school sporting commitments. Its damage limitation when you have an X like this.
I discussed the impact of this on my younger DSs with their psychologist and she told me to address the emotions. I can't fix this, I can't make it ok, at least in the short run and that I shouldn't try to. That what they need is for those emotions to be acknowledged and supported and for them to know that they can discuss anything they need with me and I won't be upset because they're angry, or sad, or missing their Dad. He might be abusive and a Disney Dad, but he's still their Dad and they miss him. I would do anything to fix that but I can't, just like I can't make him parent or put our DC before his own needs.
I know a few divorced couples and the parenting arrangements where the children seem to be doing the best are those where the parents could be amicable and discuss things and put aside their own wants to consider what their DC need. I know a family nesting is working for. I know two families 50/50 is not working for, but these two families have a high level of conflict and ongoing litigation.
The arrangement that seem to be working best amongst my divorced friends is a little different. The DC have a home base with Mum and Dad has them two afternoons after school each week and every second weekend. They have a flexible arrangement and weekend sporting and social commitments are shared no matter whose weekend it is. There's no fighting, no dropping contact last minute, no point scoring. Both these families have 2 DC, and the sharing of weekend commitments means that each parent gets regular 1 on 1 time with both children and those children are doing well. Of course whether that's the parenting arrangements or the lack of conflict I couldn't say.