I grew up an area that’s recognized as one of the most deprived in England. It’s called Bridlington if you want to look it up. My family are not the worst off but we were never rich. My mum was a teaching assistant and/or teacher and my dad worked it hospitality as a manager. So not the worst jobs but also not the best. They both worked full time.
It’s also a completely wrong that only middle class people go to University. We have this amazing thing called student loans that are only repayed above certain wages. You get bigger loans the less well off your parents are.
I don’t know what you have to do to be classed as middle class because it’s not an easier defined term. It’s also not a term really used by marxism. They use the term petite bourgeois if my understanding is correct. I guess you could call my parents that as they were landlords. But at the same time they had to work full time at a normal job and all houses were mortgaged. So you could also say they are the proletariat. This is why the marixst class model dosen’t actually hold up always in real life. Real life is too complex as people can be in multiple classes at once.
You’re also going to get nowhere by disparaging other workers just because they earn more than you. That’s what you seem to want to do.
It’s also completely natural for some people to be paid more than others based on their labour. The Soviet Union had this exact policy for jobs that required more education or more physical work. That’s exactly how it should be outside of a post- scarcity society.
It’s good that rent was that low in the Soviet Union but you also have more needs than housing. Food comes to mind where many people starved due to collectivisation efforts in the Soviet Union at the start. I understand they rectified this later but it is probable that the early stages of a socialist society will have problems like this. Things are likely to get worse in the beginning - not better.