Why don't we just call him anti-totalitarian then?
Because of his initial intention to fight against right wing fascism and a deep dive into his work demonstrates clear favouring of left wing ideology.
In his works Down and Out in Paris and London, and The Road to Wigan Pier, he criticised capitalism harshly, arguing Socialism would be the solution to it and to be a bulwark against Hitler and his fascism.
He hated Stalin. So did many Russians. Primarily because of the faction he found himself on,revolutionary flavour was not palatable to the Communists.
In 1938, upon joining the Independent Labour Party, he said this
The only regime which, in the long run, will dare to permit freedom of speech is a socialist regime.
He went on to say that his vision for Socialism included the immediate appropriation of factories and other means of production, collectivized planning of the economy and confiscation of all land from the rich. He loudly denounced those who opposed “that hated, dreaded thing, a world of free and equal human beings.
By now your hatred of communists must be making you seething with that.
Anyway I digress.
Orwell’s 1941 essay The Lion and the Unicorn: Socialism and the English Genius, describes Britain’s wartime situation, and then calls for a particularly English form of socialism, which would replace the capitalist model democratically and create a fairer society, while being informed by the most attractive English characteristics, such as love of privacy and law abidance.
1984 was a novel about what could happen under the worst case model of Socialism, namely the Stalinist model. This is demonstrated in his own words as follows -
My novel Nineteen Eighty-Four is not intended as an attack on socialism, or on the British Labor party, but as a show-up of the perversions to which a centralized economy is liable, and which have already been partly realized in Communism and fascism. I do not believe that the kind of society I describe necessarily will arrive, but I believe (allowing of course for the fact that the book is a satire) that something resembling it could arrive. I believe also that totalitarian ideas have taken root in the minds of intellectuals everywhere, and I have tried to draw these ideas out to their logical consequences. The scene of the book is laid in Britain in order to emphasize that the English-speaking races are not innately better than anyone else and that totalitarianism, if not fought against, could triumph anywhere.
He also went on to say this, (something that triggers you immensly)
while allying themselves in 1933 with the Ruhr industrialists and smashing the German trade unions and Socialist Party, called themselves “National-Socialists” to deceive the German working-classes”
That is why he is antifa.