You think you're disadvantaged so you should be handed it on a plate.
It me tell you about my df.
His parents thought they would emigrate to Canada when he was 10yo because they couldn't get a job. They put all their money into this, went to Canada and found the story that there were jobs a plenty there wasn't true and had to come back again.
Df did his 11+ the next week and failed it, so went to the secondary modern.
My gran started work at 6am and finished after 6pm (more than one job) to keep them afloat. Both her and my grandad (he died before I was born) had left school at 12, so had no qualifications.
Df decided that the way out of poverty was to work.
So he worked. He got GCEs and, unusually for his school, O-levels. He wanted to do A-levels but in those days it was very much on your own. The school bus didn't take 6th formers, so he had to work out how to get there.
He had 3 jobs through year 11 to pay for a motorbike. He had a paper round in the morning, pulling pints in the evening, and working on a farm at the weekend.
He continued doing these jobs through A-levels to pay for the motorbike, and evening classes in a subject no one at his school could teach. And btw he was the first, and only 6th former at his school. He did his A-level maths at the same time as his teacher and got a better grade.
I suspect, although he's never said anything, that his parents were somewhat bemused why he would stay on at school, when he could have been out earning a wage - possible even should have been out earning a wage.
And he went to university. Which from his background wasn't done. And then got a job and rose to a good level in the large company he was in.
I will add that he clearly (now) has ASD and almost certainly ADHD, but neither was recognised back then.
But the thing that he had, which you seem to miss, is that he was a hard worker. He still is, as he approaches 80yo. When he was doing exams (as I remember him doing a few through work), he would spend every spare moment reading to make sure he was best prepared. I remember him reading a text book as he washed up, and recording himself reading facts he needed to memorise, so he could listen to it while he was gardening.
I have never heard him complain about his background, or his disadvantages. I have never heard him expect to get something because of what he's been through.
I have never heard him say that he deserved to get better grades (which he clearly was capable of) or that it's not fair others had advantages. Or complain that his parents made decisions that effected him.
He took the position he was in, and did the best he could there.