LOL. He didn't defect to Sweden but to the Soviet Union. Find a local library and read up on it sometime. Let us know if it was a "pleasant place during this time." Get back to us. Even nutty Oswald came back.
When Oswald returned he said the USSR was a "slave system" and condemned the Communist Party of the US for its slavish support for it ("The Communist Party of the United States has betrayed itself").
He wrote: "The Soviets have committed crimes unsurpassed even by their early day capitalist counterparts, the imprisonment of their own peoples, with the mass extermination so typical of Stalin, and the individual suppression and regimentation under Khrushchev."
Even a crackpot like Oswald knew it was a hell hole.