How the fuck am i supposed to co-parent with someone as useless as my ex

sorry for a long rant here

So for context we have 2 kids together aged 2 and 4 i left when i just had our second child and i have my own place with the kids he comes and sees them whenever he can as he has no schedule al to his life he just sut does as he pleases and gets jobs when he can although barely anyone takes him as he has such a rep for staying about a month then just not going to work. i tend to end up giving him money to come see the kids which i know is stupid but sometimes the kids just need to see some family and he stays over for a few days ( he does not have permanent living arrangements before anyone questions as to why he comes to my house ) i recently broke my leg to which i asked for him to stay over and help with the kids as its his responsibility to raise them as much as mine and he’s the only person close to me that doesn’t work so it just made sense. he’s been staying over but my god is this boy useless. he drives me insane. he barely takes the girls to school because he just doesn’t get up, i ask him to clean the pots and he leaves them to go moldy he leaves recycling all over my kitchen to also go moldy. he ends up leaving me with the kids so he can go toilet like 6 times a day. today is my last day with him as a family member has offered to take us in for temporarily time as i just cannot live with him any longer. so last night i asked that all he do is clean the kitchen and i’ll do the rest. i scrubbed down the whole bathroom living room hallway and packed the bags whilst he couldn’t even finish one load of pots. it’s infuriating. i may be out my cast but i still cannot walk around without my crutches so im unable to carry anything. i’ve had to pick up so much slack even though im exhausted from just moving about having to put more effort in getting around a room then normal and yet im doing so much more then he is.

how the fuck am i supposed to coparent with someone as irresponsible as him? i try to keep my cool which isn’t often since i quit smoking too but i just cannot have him around anymore he’s useless and is more work then it’s worth. and he keeps having the audacity to keep taking from me. it’s little things like he took 40p from my jar to get himself an energy drink or i send him with £10 out to get the kids some lunch and he gets himself a drink like im literally trely paying for everything and he just t helps himself to more doesn’t even ask. and all he keeps telling me is that i’ve had years to get used to looking after the kids and he’s not even though when we was together he left at every chance to go do whatever i was left at home with the kids from when they was babies. i told him before that if he wants to see the kids would have to be at a centre ( this was before i got my place ) and he would guilt trip me cuz he was in foster care and he blames everything on that and how “i know how much he hates social services” i have given in to so much and yet i just still can’t seem to let him go without. like im trying not to be the ‘mum who doesn’t let the dad see his kids’ that im just tired of being the good person.