"It could've been worse" (a.k.a. the North Korea "defense") isn't a counter-argument to "This is shit and here is why".

It's at best whataboutism.

As for the Soviet Union and similar, it's still an elite in power doing what's best for themselves. In Capitalism the selection to the elite is by Money (and no, it mainly doesn't come about by merit but by being born in the right family and not giving a shit about one's fellow human beings) whilst in the so-called implementations of Communism/Socialism by working your way up within the Ruling Party (ditto in Fascism, by the way) which is a mix of smoozing and knifing others on the back.

Both systems put sociopaths in control, both consist of a elite minority in power and using it to serve themselves, and most people will neither be in it nor me served by it.

Neither option is good so we need something else.

So far, the best we have is a little bit of Capitalism tightly controlled by Social Democracy, IMHO.