Limited social policies are a necessary evil of organizing a society. The marxism you champion is a detriment to the human spirit and promotes sloth.
Even Marx never really defines anything as Marxism.
It is a vague concept in reaction to the massive industrial abuses of the industrial revolution, around 1830.
It in general is saying that all people should cooperative, collectively, communally pool enough resources so they can jointly build the infrastructure they need and want.
That is a gazillion times better than having evil, greedy, capitalists monopolize all the wealthy can control what gets built and what you need to live will cost you.
In general, all the evil rulers, kings, emperors, robber barons, etc., have always been capitalists.
Never once have collective, cooperative, and communal groups ever been evil, abusive, etc.
If you think the USSR disproves that, you clearly are not thinking, because obviously capitalist bank robber, Stalin, killed off all the idealists who supported collective, cooperative, and communal ideas, and he implemented a capitalist dictatorship instead.
The fact there was no competition does not make it collective, cooperative, or communal. It just means the one capitalist wiped out all the competition, as all capitalist would always do if allowed.
Just go over history and look at all the evil rulers:
Pharaohs - capitalist
Alexander - capitalist
Nero - capitalist.
Caesar - capitalist
Atilla the Hun - capitalist
Vikings - capitalist
Vandals - capitalist
Genghis Khan - capitalist
Pirates - capitalist
Napoleon - capitalist
Stalin - capitalist
Mao - capitalist
Castro - capitalist
Putin - capitalist
There really have only been very few democracies, and the main trait is they always then increase collective, communal, and cooperative services.
The only way that any collective, communal, and cooperative services could discourage innovation is if nothing individual was allowed.
But that should NEVER be the case.
Having collective, communal, and cooperative services can't ever prevent anyone from individual innovation.
The only thing is that when they start to effect other people, like hiring more than half a dozen employees, they have to follow some regulations, like collective bargaining, workplace safety, preventing child labor, anti trust laws, etc.