Eddie - I'm with you on this
It's not fair, is it, and we are all entitled to have a moan about it.
ExP lives 5 minutes away and can have as much access as he wants - he just rarely bothers.
I try never to ask to suit me ( if I wanted a night out, for example) but only when DD asks when she is going to see her Dad - he is the one who decided that once this year so far and a grand total of three times last year is being a good father.
The only one limiting the time with his daughter is himself and his prioritisation of his social life over everything
I also posted on another thread, as I have also had to sacrifice my career progression to look after DD as I can't just go for the jobs I want, as I have to deal with everything else myself. I turn down social occasions, as I have DD. And I am the one with the headache of covering all school holidays, in-service and numerous medical appointments.
He does whatever the hell he wants. And he sees her so infrequently, it's like a huge treat for her to see her Dad. All down to him.
So, Eddie I totally empathise - and I think that lots of us would agree with your OP, not be offended 