Fair point on the terms RP and NRP and promoting conflict - but we are in a society where the 'system' dictates terms and labels like this, the 'system' like labels. I can't see that changing - would be nice though BDAP.
From my experience from separation Day 1 there is the presumption that 'Mum' knows best in relations to kids. I had this attitude from School (initially - that changed), Cafcass (initially - that view changed), mediation service (again that changed).
I can't see any magic bullet but I think that having some sort of intervention / counselling alongside the financial discussions running up to the decrees / consent orders etc would help. Intervention that specifically deals with the kids with a different counsellor or mediator - seperate from the finance right from Day 1 with the ability to help both parties see what is the best for their kids. The only brief glimmer of hope I had was a Cafcass Officer seeing that the root of the problems lay in my ex's hostility towards me, but my ex just wouldn't engage with her, arms folded, stared out of the window. If she had more time with her I think she would have got somewhere.....
I am fully in favour of shared parenting, but to make sure it covers all areas, not just the time each parent spends with the kids - communication is the biggie for me. Things do get missed in day to day life and shared parenting shouldn't be about absolutely eveything be relayed between parents , but with a system that is embedded with the kids at the heart of it, not where they can be used as pawns. The kids seeing open and honest communication will help them no end and hopefully decrease the hurt and confusion they feel at times.
My ex wife would no doubt see me as you see your ex Bintang - every situation is different so I can't comment about yours at all. But the reality is very different from the perception my ex clings onto in my case and a perception she actively promotes to anyone who will listen. One of my youngest son's friends parents (sounds complicated I know !), told me after spending some time with me and the kids that I was really nice and not what she was told I was like.... that is not an isolated example either.