Did I ever ask anything about suppression?
You asked: 'How was creativity disallowed in the USSR?'. As far as I can see, the 'disallowing' of creativity is suppression.

However, you're going off the tangent yourself.I responded to the message that linked creativity to economy, and that could not possibly mean creativity in poetry.
You asked: 'How was creativity disallowed in the USSR?'. It seemed, generally speaking, such a stupid question that I thought I would deal with it by reference to a sphere of creativity about which I have some knowledge. Economics isn't my strong point.

Which plays were suppressed?
'Moliere', 'Flight' and 'Adam and Eve' were kept off the stage during the 30s, and were not published until after M.B's death.

His best work, which you apparently think was M&M, was never published -- but it was never finished either.
Never published? I have two copies on my bookshelf.

As far as I remember, his longer prose works - including M&M - were published in the Soviet Union in the 60s. My favourite, perverse as I am, is his Theatrical Novel.

If I remember correctly, his poem was highly anti-Soviet (using the terminology of that time), and that was explicitly forbidden.
Something about cockroaches and mountaineers, I think . Of course it was anti-Soviet, but if critical words are 'explicitly forbidden', isn't creativity being disallowed?

Dura lex sed lex.
More like lex iniusta.

Hello? She left the USSR in 1925 and returned in 1939, and committed suicide in 1941.
Hi. She actually left in 1922. A minor detail. More important: why should someone as brilliant as Tsvetaeva have felt unable to practise her craft in the Soviet Union?

You made me laugh so hard I almost choked. No really! The very doctrine of "Human Rights" is ideology and nothing but ideology.
You're going to have to explain that one to me. Sounds a little...partisan.