I found an old thread that id read many years ago. Your H may not be following it exactly, but there are a few elements there.
Saffysmum
Twunt followed "the script" down to the letter, therefore I feel, like many lovely people on here who helped me identify the script, as somewhat of an expert.
They become very self absorbed, and determined to 'find the happiness they deserve'. They feel they are entitled to this, regardless of the fallout to the family they leave. Before leaving, they often detach themselves from their family. This is giving them a headstart - they know they're going, so they leave mentally. Twunt became cruel, distant and cold. I felt I was constantly being tested and found lacking. I later realised that nothing I did or said would have changed his mind, but he was quite happy for me to feel all the responsibility for the crumbling of the marriage (22 years). He didn't have the guts to actually go, so behaved so appallingly that I threw him out.
They become angry with you. Twunt wanted out for almost a year before he left. He had told me he no longer loved me, but he wanted to leave when he wanted to. I took the initiative, threw him out one Wednesday, and started divorce proceedings the next Wednesday. The anger radiated off him in waves. I was stunned by this - because I thought I'd given him what he wanted. The wise ladies on here nodded sagely and said "Of course he's angry....he's furious with you". When I asked why, they explained that this is typical. He wanted to control things. Perhaps he wanted to return at some point if life with Lady Twunt didn't work out. Perhaps he wanted to stay with Lady Twunt, and start divorce proceedings himself, when it suited him. Perhaps he wanted to carry on having "the happiness he deserved" without reality and divorce petitions bursting his fantasy bubble.
In order to justify their appalling treatment of us, they have to re-write history. We become weak, nagging, a pain to live with. "See!" they cry to all who will listen "she was unbearable - I tried so hard, but she was a nightmare, so demanding...I had do do everything".
They then get the biggest shock of all, when we again burst their bubble. I had the audacity to be ok. To file for divorce. So I wasn't the weak little woman he had tried to tell everyone I was. I could cope without him. So, ditto more anger.
They do everything in their power to hold up the divorce. They don't want to return, but they are bloody fuming that they are no longer running the show. "This is all moving too fast" bemoaned Twunt last September as he ignored yet another solicitor's letter.
They are not happy, and they may well have regrets, but they feel so justified that what they are dong is right, they become more and more self centred and obsessed. Twunt started dressing more and more like a member of JLS, complete with fake tan and an admirable collection of L'Oreal for Men products. This was in complete contrast to the pre-twunt days, when he looked like a normal middle aged bloke. This caused much mirth from teenage kids when he deigned to visit, and we still giggle over the lycra running shorts.
They loathe being ignored. Twunts ego was being massaged by Lady Twunt, but she was/is found lacking; he's bloody furious that I am coping and am happier than he is. "How can she be happy! She's not with me - it's impossible" I bet he thinks. So he gets petty and nasty to the kids. They, having learnt from their mother, ignore him too. So he argues over the settlement to try and take some control back. To try and make himself matter to us. We ignore this, and he stops paying the maintenance. My SHL (Shit hot lawyer) rolls her eyes, gives him a slap and puts him back in his place, increasing the maintenance just because she can.
They sulk. Things are not going according to plan. This isn't the way it was meant to work out. THEY DESERVE TO BE HAPPY.
They want sympathy. They tell you that they would like you to 'work on the kids' on their behalf. They act hurt and wounded when you tell them to f*ck off.
They are getting really desperate now, so stop caring too much about how they look. They are seen lurking in Tesco's minus fake tan and eye gel. They tell friends they are "coping" but "sad that things have turned out like this...all they wanted was to be happy".
(Where I am now). They move house (again) and try to buy the kids with expensive phones. They fall over backwards to offer lifts and even say they will lay on parties for the kids. They feel hurt and wounded when kids tell them to stick their phones.....
www.mumsnet.com/talk/relationships/1486878-Departed-cheating-scumbags-who-follow-a-script?reply=32141356&utm_campaign=reply&utm_medium=share