Two things I see most often from my clients in custody related matters: 1. focusing on what’s happening RIGHT NOW and 2. dwelling on the negative actions by the other parent. If you’ve been in a custody battle, perhaps you have said one of these complaints:
“the kids didn’t call before bedtime when they are with the other parent”
“the other parent is not being flexible with the schedule for the children”
“the other parent is making all of the decisions regarding the children, and not communicating properly (either timely or at all)” and on and on.
In these instances, my advice is: give your ex enough rope to hang themselves. Combative exes are their own worst enemies. Give them the opportunity to hurt their own cause, and they will always take it.