To wish my children's father would didn't exist

[Gizzygizmo]

I have 2 boys with my exh they are now 11 and nearly 13.
We split up when they was very young, not long after he very quickly had another baby with his new gf.
10 years down the line he has 2 kids (plus my 2)
Never contributed to their up bringing financially, which hasn't always been an issue I would of even just been happy with help of uniform and school trips, but his other kids come first and he always said that's what my tax credits are for. He would see them every other weekend and 1 day a week after school.
Fast forward to 2017/18 we moved 20 odd miles away to be in a much nicer area. When we first moved it took him weeks to be bothered to see them, hardly text and when he did he would tell them it's all my fault. Family told me to block his number on their phones, but unfortunately not possible when they would hate me for doing that - they told me he's their dad and still loves him. Fair enough.
Things got sorted and I let them go there for Christmas day, was meant to be 2pm and the tosser showed up at my door 2 hours early before my parents could even give their grandchildren presents.
Before I passed my driving test he would pick up and drop off every other weekend.
Soon as I passed I knew he would take the Mick and expect me to do it (out of my own pocket)
A week before summer holidays he told me he wasn't doing drop off and pick up as he can't afford it, well neither can I and considering he pays NOTHING why should I also have to be a taxi to make his life easier. Bearing in mind he's only 20 miles away he hasn't seen them for nearly 2 months, has been on holiday and enjoying it with his other 2 kids.
My oldest realises what an ass his dad is and is said well if he can't be bothered, neither can I.
But my younger boy still wants to see him, how on earth can that scum just not care.
I haven't expected maintenance, just to make sure he can cover diesel so his kids can see him.
He is absolute t*at and hate him.
I don't know what to tell my boys, it's devastating how all he cares about is his other kids.
I hope I am not being unreasonable, bringing up my children for the last 10 years with minimal help, and he even expects me to fund his contact.
So I've been called a money grabbing c**t for wanting diesel money.
This man has lived on benefits since my kids were babies, don't want to work and is happy on benefits with his Mrs and kids.
I work and have done the last 4 years

First get call CM.

I did and they charge £20 application fee, it would anger me so much if I paid that for them to tell me he has other kids and can't afford it.
Hes already made comments saying, go csa you won't get anything

Time to call up the people that force CM out of deadbeats and see if they can back date it

You will get plenty and they are meant to put the charge to him not you aren't they?

They said as I'm the one making the application I have to pay.
I hate him so much, all I want is for him to text his kids and tell them he loves them and wants to see them, my heart is literally breaking for them.
He hasn't text them since July, piece of sh*t he really is

Unfortunately it is the applicant that has to pay, it's free if you were in an abusive relationship with Ex. And I think OP is right, if ex doesn't work, she would only get around £5 a week, and that's without the other children taking into account. Ex sounds like a total plum, I would just stand back and wait. Carry on doing a fabulous job bringing up you DCs, they'll soon realise which parent was around when it mattered, and when it didnt.

How is contacting CM going to help if he lives off benefits himself. It really makes me angry these blokes who just start up another family and expect the state to provide for four kids while he provides nothing.

An absolute parasite

Similar position to you OP. They are shits it's their loss though, not our kids. I do daydream my DC would have a lovely father but the fact is he has an abusing shitty waste of space and I can't change that for him sadly so my DC isn't missing out as it didn't exist to begin with