If he strops and moans about not getting a shower exactly when he wants I am not sure kids are his thing.
If he's a light sleeper and doesn't like not getting his 8 hours beauty sleep I am not sure kids are his thing.
If he has one bad experience that means you don't book long holidays I am not sure kids are his thing
If he is at peace with complaining and not being in the tiny bit grateful that yes perhaps you booked a train he didn't like but hey to make you cry and not be gracious in the slightest I am not sure kids are his thing.
Kids do not go in boxes, they are the opposite of hygienic, they thrive when a mum and dad love and appreciate each other even if they fuck up, they destroy routines and you will need longer holidays to really enjoy them and you holidays will be all about them not him.
If he can't get over this he really does have the shock of his life with a baby.
I would spend the weekend pointing all this, and a lot more, out to him. He's going to be pissed off anyway might as well not hold back.
It sounds like your whole lives skin around his preferences is there any balance?
My H hated soft play but went and got on with it, he would sleep on a mattress on our floor when both kids were little because they came up to us when they woke and we ran out of space, he would put his needs last every single time, we went on some trying holidays but the kids loved it discos, arcades, go karts, fairground, because it wasn't about us, intellectual conversation having dinner in a nice place with a nice view or whatever is out of the question.
What I am trying to say is you need to be able to adapt with kids, with grace, love and kindness. Could he really do this? I would ask him, because he can't even adapt to a sleeper train with grace, what a fucking hero.
He sounds like a knob, a knob I wouldn't want as the father figure for my children.