USSR and other socialist countries mostly just suppressed those who wanted to overthrow socialism, much like capitalist countries have and are suppressing socialists wanting to overthrow capitalism. The notion that socialist countries were police states with no personal liberties is vastly overblown; majority of the people lived completely normal lives.
Also I think the key thing here is to understand that capitalism needs to keep a huge amount of the worlds population in poverty in order to sustain itself, and like Stalin said:
“It is difficult for me to imagine what "personal liberty" is enjoyed by an unemployed person, who goes about hungry, and cannot find employment. Real liberty can exist only where exploitation has been abolished, where there is no oppression of some by others, where there is no unemployment and poverty, where a man is not haunted by the fear of being tomorrow deprived of work, of home and of bread. Only in such a society is real, and not paper, personal and every other liberty possible.”
Anyway, HLTV isn't the optimal place to discuss this, as if I really wanted to try and convince you it would require a lot of time and effort but hey, at least we can agree to disagree. If you're ever interested in actual answers as to why communism isn't just an utopia, read Marx :)