@Somenewname
Thanks for the comments so far by the way. He would be flexible with me if I needed a favour but he’s had a couple of relationships since DD has been born and when he’s been with someone he’s been difficult and totally inflexible, when he’s alone though he’s much easier and will usually comply with change if/when necessary.
I think maybe I’m bringing the past in to this situation perhaps.
My ex husband was just like this, and I suspect many are.
Having an under-5 around requires everything being geared to their needs, even down to the house being made safe for a small child. Some men in particular, especially if not living with this 24/7, have trouble feeling they're doing it ok, and can feel stressed by it.
Add a new gf into the mix and his priorities are really under strain.
It's not very competent or good of him, but he's not alone.
My ex got better and better as our child got older and easier in practical terms to have. Now he's great. He still sometimes finds the juggling of partner and child a challenge, but luckily his partner is fab and I'm delighted she's in our child's life. You can't have too many people to love your kid.
So: I'd cut him the slack. Ride the waves. It might sound a bit long but wait a few years (!) and it should get a lot better. If not, your DD will naturally not need him and that'll be much better for her.