WLTMEET, I have Sooooooooooooooo much to say on this thread I'm wondering if I should n/c.
We also only have 1 DC (although we are still together) but we used to be in a situation where we had quite a lot of money (a high earning job). We made a lifestyle choice 2 - 3 years ago, and now we have a lot less money. Enough, but a lot less.
Back when we had lots, we did nice things too. We often had 3 holidays a year. At the moment we're still managing one, but the savings are dwindling, so don't know if we're going to manage that in a year or two's time.
I should say that when we were relatively wealthy, we did do lots of free stuff - we went to the park loads and rode our bikes and went for walks, etc. Having money doesn't stop you doing any of those fun things. And one of our holidays was often camping (i.e. cheap) because we like camping
Where your ex does win hands down is with the companionship his multiple children will have. And lessons in teamwork, getting along with people, a strong network, shared experience, etc. He "wins" that one, you lose. LUCKILY your dd gets the advantage of experiencing it, albeit slightly at the periphery.
You win at the all the disposable income goes on her, good individual attention, treats, and her being prioritized.
At this point it's all win-win for your dd. (if galling for you and your ex).
We also used to be foster parents, and had children for 'relief' which generally meant a child we got to know well coming to us for 1 weekend a month for the medium - long term. We also did occasional emergencies, where we'd have a kid for a short period of time at v short notice (usually because they'd been removed from birth parents) for a short period while a more permanent home was found for them.
DD was 5 when we started (btw - we did it to give her some of the sibling experience which we were so lacking). OMG... how my toes used to curl when she first met them.... chatter, chatter, chatter and EVERYTHING totally inappropriate "hello. We've just been to Disneyland Paris, have you been to Disneyland Paris?" [we only went the once!!!] to some deprived poor sod who'd never been anywhere.
I soon learned to tell myself to stfu. She got them talking EVERY SINGLE TIME. Even these poor, damaged, traumatised kids. We only had them (the emergency ones) 48 hours or so, and she got them to open up and talk just by relentlessly telling them about herself and asking questions of them. And once she'd done that, we could start to develop a relationship with them. So on the one side I get your ex hating her talking about what she's been up to and what her plans are. But I also no it's done with no malice or sense of boasting.
From your later posts, it sounds like even if you'd just had the one and stayed together, your lifestyle would be very different to what it is now.
Your dd will soon be at an age to realize that your ex is a joyless arse. But even so, he will be giving her experiences you can't with a large family, and that's all to the good.
And yes - my dd is desperate for friends, and gets VERY bored with her boring old parents, so she LOVES a holiday club. although when she was younger and had no choice but to go she wasn't as keen (but, unfortunately, we both had to work at the time). And NOW she loves it.
YNBU, he is. Hold your head up high and carry on!