Orwell was a socialist until the end of his life. He opposed authoritarianism in general and Stalinism in particular.

"Every line of serious work that I have written since 1936 has been written, directly or indirectly, against totalitarianism and for democratic Socialism, as I understand it." —George Orwell, 1946

Here's a short piece that might interest you: https://jacobin.com/2023/02/george-orwell-1984-prager-university-socialism