Fully prepared to be told IABU, and I wasn't actually affected so I probably am.
Pulled into a supermarket earlier where there was one parent and child parking space left. Just before me, a hatchback pulled into it, half over the dashed lines so I had to park in a regular space, of which there were a few, (hatchback relevant as not a huge 4x4 that wouldn't fit in a space). Regular spaces weren't too bad to be fair so although to get pram and ds our in car seat I had to be mindful and careful with doors and wait for the car next to me to get in out etc I was able to manage.
The car that had parked in the last space was occupied by a mother, a teenage girl and a boy of 5 or six in a school uniform (well behaved).
AIBU to think that if you have children of an age where they do not require equipment to be out and about then you don't need to take the last parent and child space? Also that the spaces are massive and there's no reason to park half in, half over the lines?
Like I say, it didn't actually affect my day much, but things like this irrationally annoy me. Totally aware it's a first world problem and that I must not have enough to worry about.