I'm a SAHM, DH works long hours in a very high-pressure environment. We have two DCs aged 4yo and 11mo.
I have a very rigid weekly routine (strong Aspergers tendencies!) and Monday is normally my day for tidying up the house after the weekend, doing the food shop and generally getting everything sorted out for the week.
Today, I decided not to do that. DC1 starts school in September and I decided we'd have a day out instead, just us, before the school holidays began (and everywhere around here gets busy). Carpe diem and all that. I had childcare for DC2.
DC1 and I had a lovely day out, in spite of the weather. Lots of laughter. One that I will possibly remember on my death bed. We got home just in time to collect DC2 and have tea, then bath/bed.
DH has rained on my parade.
. He came home and was horrified at the state of the house. Ok, it was a bit messy, toys not put away and so on, but honestly it's never that bad (did I mention I have Aspie tendencies? Well, it wasn't bad enough for me to be upset by it, I was just a bit twitchy!) and it is clean. But he complained about it, had a go at DC1 about it before bed time, and got into a grump about all of the "clutter" (toys and DC1's bits and pieces).
I've been to play at lots of friends' houses with children and ours is about average, possibly tidier as we actually have less toys than most and a dedicated playroom. We don't buy that many toys, just odds and ends I find in the charity shop.
Our house is, I will admit, a bit more cluttered than normal as there are the piles of laundry on the landing that I didn't get done today (I will go balls-out to do them tomorrow) and also boxes of things for upcoming birthday parties and a family do which are piled up in the house, nowhere else to store them.
AIBU to think that a) a bit of clutter/mess is to be expected with children, especially young ones, and that b) DH should shut the f* up about it (which is what I told him to do, BTW) 
I'm not leaving the bastard, BTW, just venting!