Consider Venezuela. There was no civil war there (unlike Russia immediately after the October revolution, and unlike China before and after WWII). There was no foreign power intervention (unlike Korea, Vietnam). Yet Venezuela is authoritarian.
(There's also Nazi Germany. The Nazis were socialists, really, and they also had no civil war and no foreign power intervention, and that ended pretty badly too.)
I think the answer to your question is: yes, yes, of course it would have.
Now, you might point to post-war Western European socialism, but there we have a number of stabilizing factors (e.g., NATO, U.S. troops on the ground) limiting the freedom of socialist politicians to be as extreme as they might want to. As a result, post-war Western European socialism mostly means just high taxes and large welfare states.
Generally, socialism outside post-war Western Europe ends badly. There have been left-wing presidents in Brazil and others where it didn't end badly, but they didn't impose socialism -- they ruled more like Western European social democrats, not like Chavez, Castro, or Maduro.
