The people who were lucky not to end up in jail, Gulags, banned from good jobs or made to work in the coal mines, you mean. Who were lucky to be allowed to go to university and take on an interesting job.
Survivor bias might play a huge part here.
Of course there were people who benefited from the system.
You mention "quality education in the trades and higher professions for example." - what percentage of the population got to enjoy that?
Community - as long as you didn't dissent, I guess? What if you didn't approve of everything the government did? Then community turned into people spying to you and ratting you out to the secret police?
Childcare and healthcare are available in non-communist countries, too. Besides, childcare meant being forced to give up your children at three months, so that you could go back to working and doing your part for the common good.
"the USSR did some things right."
Can you give some specific examples?