Yeah, communists had all the theoretical reasons their system was better than capitalism, still in the end, they were the ones starving.
The task is still on you to demonstrate how the free market isn't a fiction.
I went into a small one this very morning, to buy some apples and eggs. Looked very real to me. And free: nobody told the sellers at which price to sell and nobody made me buy if I didn’t like it.
Free markets are a specific definition with specific conditions.