He kept up an act of wanting to be a better person/father for a couple of months, but has been gradually getting shitter. We had an arrangement of which days he has DC. He claimed his work hours changed meaning he cut down one of the days - he said he could not make up the time on another day due to his schedule.
Yesterday he informed me that he would cut off another day of his contact with DC because.. he’s starting a new hobby. I wasn’t happy obviously and asked why he couldn’t simply do the hobby on another day, or while DC is in school - his response was to make out I was being really unreasonable and argumentative, and basically turn into a brick wall and totally refuse to discuss it. This puts a massive strain on me, as I currently work on the day he is cutting from his contact.
I tried organising some childcare for the day he’s missing - and he took great offence to this, insisting that I was trying to make all of my family/friends hate him and think he was a terrible person
so he didn’t want anyone to know that he was dropping an entire days contact because he has a new hobby which lasts for one hour on that day.
He sent me loads of messages later that day basically telling me I’d caused this and I clearly wanted him to go away.. that I’d purposefully tried to make everyone hate him.. all totally untrue. He was meant to pick DC up from school today but he didn’t and hasn’t communicated with me at all, he didn’t even let me know he wouldn’t be doing the pick up.
Sorry it’s a bit long winded, I suppose I just want some reassurance that this isn’t my fault and I haven’t done anything wrong.. I’m really worried about how this will affect DC; whenever he misses one of the days he’s meant to pick them up from school etc it causes them a lot of distress. I don’t know how to explain to them why he isn’t seeing them at the moment.. and as I don’t know if it’s permanent or him punishing me for challenging his hobby cutting into his time with dc 
Just for context of what he is like as a person.. this is a previous thread about some of the issues we had in August
www.mumsnet.com/Talk/relationships/3669512-Cheating-huge-number-of-women-Please-advise
(sorry if it’s not clicky)