Socialism and free market are not antonymous which makes your question that you begged me to answer for several pages a false dichotomy. Just because Marx said something does not make it false nor does it make one a marxist for acknowledging this fact.
You need to evolve from the neck up.
you are surprisingly correct, but for all the wrong reasons.
socialism collectivism and even communism can happily co-exist inside a capitalist constitutional republic (or any largely free society founded on the principles of The Enlightenment)
capitalism, freedom and liberty CANNOT exist in any meaningful form under Marxism
the words are not antonymous, (antonyms, words which are opposites) but they are antagonistic.
when authoritarian collectivism expands, liberty and capitalism shrink, when capitalism and liberty expand, authoritarian collectivism retracts.
the only parts of classical Marxism you seem to reject are the violent revolution, dictatorship of the proletariat, and the Socialist Authoritarian State, while all the other assumptions, ideals and methodologies remain intact.
Mussolini rejected violent revolution, in favour of the democratic process, but DID embrace The Authoritarian Socialist State, and dictatorship (participation of the proletariat may vary) within the context of the Marxist Long View and the promise **cough cough** Bullshit! **cough cough** of an eventual Communist Utopia.
modern "Democratic Socialists" reject the Authoritarian Socialist state AND violent revolution, but celebrates the dictatorship of the proletariat through the electoral process and voting themselves the right to pick another man's pocket.
"Democratic Socialism" is simply Type 2 Marxism, with a late in life onset, caused by poor intellectual diet and excess consumption of sugary political treats like progressive tax rates, social welfare programs, and yes, socialized medicine. with careful control through medication and minor changes in diet, the patient can live a long healthy life without having his foot chopped off or slipping into a delusional state.
im not physician, but i think you should have yourself checked out.