The vague idea of getting the same as everyone else, while not having to actually make the effort, appeals to sheltered and unappreciative western kids who feel oppressed because they have to put down thier entertainment device and do thier maths homework.
Who told you western teenagers were too dumb to understand this fact and would fail to include the remedies to their ideology when they rile up against capitalism?
The problem is that places like the USSR were just authoritarian using communist wordsand concepts to keep people in line. It was just state-run capitalism. Communism is fundamentally about not having a ruling class.
Just like the "democratic" people's republic of Korea isn't a democracy, the USSR wasn't socialist.
So I am a middle aged man, living with my family in a 140 sqm house with a garden, built in 2019 in one of the richest countried of the world. We go on vacation 2 times a year, eat good, do a lot of freetime activities like amusement parks, eating out, etc. Both my wife and me work on well payed proffessions and are at least in the top quarter of people in our country regarding wealth. And I know for a fact that many people earn less for far more work, because I used to be one of them. Only in my country, one of the richest in the world. I was fortunate, because I was gifted with a pretty good brain and other things that are absolutly not my doing, but there are a lot of people in low paying and minimum wage jobs that work a lot harder than me.
TL;DR: Capitalism is no meritocracy. The rich get richer, the poor get poorer. It's a fucked up system and we need something more fair.
Consider the military. Soldiers have different roles but they are given the supplies they need to continue doing their jobs. Everyone contributes to a larger goal.
Is that so? People in the early days of the Soviet Union were doing math far beyond their Western counterparts, for free, and they grew up to fight Nazis. I guess they were just priviledged little kids reading books who were begging to have everything for free without trying. Liberating Auschwitz was just a bunch of sheltered rich kids crying about not getting free cake after dinner.....