Ex won't communicate with me as it is disrespectful to his gf
What nonsense is this. You have young children together, so obviously you need to communicate. I wonder what kind of woman is happy with a man who doesn't see his children. What happens if he has kids with her and they split up. Does that mean he'll not speak to her when he moves on. I'm sorry, but he's crazy and irresponsible.
Anything we have to say or discuss has to go thru his father.
Is he a man or a mouse. What grown up, sensible man does this.
When did he start being such an idiot in the relationship.
Parents are best in a child's life, if they are going to be a positive influence. Nothing about him, gives the impression that he's capable of that.
I know parents love their children unconditionally, but the inability to tell your child young or adult to when they are wrong, isn't helpful.
It simply enables their poor behaviour and has a negative affect on the way they conduct future relationships and their ability to deal with life's challenges.