As a baby I was stuck in the boxroom, whilst my toddler DB got the largest room in the house.
As we grew up this arrangement never changed, even though I grew to be the taller sibling. There was just room for a cut-down junior bed in my 'bedroom' so I slept squashed up on it (I could not stretch my full length from the age of about 12). There was no room for any other furniture or even a radiator so the walls were black with mould that directly touched my skin - due to aforementioned tiny bed.
I was the one with the friends and boyfriend, but I had nowhere to take them. My brother had no friends so used his mountains of space to just make a mess and be a slob. I had few possessions because I had nowhere to put them. Any inherited 'gifts' (e.g. the old TV) went directly to him as I had no room. When I had exchange-visit friends to stay he would refuse to give up his room and they had to go in my mouldy tiny room with their suitcase - embarrassing! I played a large musical instrument but had nowhere to practice it. I begged my parents to change the door so it opened outwards or slid sideways to give me more space, but they refused as it was too much effort and would 'spoil the house'. Any time I spent in my room was spent writing stories or doing homework as I had nothing else to do in there.
When DB went off to uni he still refused to give up his room and so I, as a 16-year-old 5ft 9inch girl with A-levels to study for, slept on a 5ft 5inch bed whilst his room remained an out-of-bounds shrine. When he was 25, and I was back home for a bit after uni, he finally gave up his childhood bedroom and I was allowed it until I moved in with DH. I had few possessions as I had had to be so frugal with what I owned - just me, my musical instrument, and a few clothes/toiletries.
I get so jealous now when I see girl's bedrooms with lots of space and things in them and beautiful furnishings. I wonder if I'd had a larger room and somewhere to take friends, would I have had more friends? would I have wanted to study more if I had a decent study space and done better at school? My friends and DH feel the injustice on my behalf, and my friends with DCs tell me "girls need more space - you should have had the larger room" though I don't know if this is true. I see families where the girl is the younger sibling but has the larger room.
This is all part of a bigger picture of how my DB was/is treated differently to me, but it's the one thing that for some reason upsets me the most. Whenever I have mentioned it to my DM I was told I should be grateful because she had to share a double room (and double bed) with her sister and at least I had my own space. When my parents sold the house a few years back, my DM asked the estate agent "can that room really be called a bedroom? it's not really is it", and yet it was ok to put me in it!
Shouldn't parents want better for their children than what they had themselves, rather than guilt-tripping them that they should somehow be grateful for existing? I shall live vicariously through the beautiful bedrooms of any DDs I have.
Tell me your childhood bedroom injustices and make me feel better!