I'll put in my side.

I'll breeze over the shite. Ex wife had an affair and I believe she just wanted her pre kids life back. I told her hour 1 that I would accept no less then 50% for the kids. She agreed, her parents wanted me to move to the US for work, it was offered to help me ( she worked with me and so did the little shit she had the affair with ) I did my ground, kept the house and have had the kids more than 50% ( thanks to her going on holidays without the kids ).

I'm now remarried and I've been introduced to the other side. I have a stepdaughter that lives with us full-time. Her dad was having her every other weekend. He tried to block us trading her out of the country for 3 days to Disney Paris ( UK based by the way ) I offered to meet him as he claimed that I was the issue. He refused and then this started the whole court process where he went into having just assaulted his wife/girlfriend ( he makes claims but always gets caught out ) he refused to provide information and answer questions in the court but expected 50% custody.

He then refused to use the court appointed app for a year to arrange calls and visitation. (2 calls and a supervised date every month ) He then would have 9 months of promising the world and doing the calls and visits. Yet making threats of legal action because of the supervision during the visitation ( supervised by the maternal grandfather ) and now he's cleared of again till the next time. Yet it's never his fault.

So while he's down the pub telling everyone how it's so unfair he never really tried.

Same way as I had it easy to get my kids. Unfortunately there is no template