I think it is more complex than that: Huxley was a person interested in 'religion' who was almost brainwashed into 'scientific' thinking and was at enough of a cultural turning-point to see what was coming, whereas Orwell was a very naïve sort-of-socialist who was so shocked by Stalinism that he adopted the same methods (as a society, that produced in 1984 is totally unbelievable as to origin and organisation). Nowadays the masses are so brainwashed that there is NO powerful alternative - people object to the detail of the destruction of humanity but simply cannot step back and understand it, so we wont get any literary product that's serious out of our destruction, alas.
The entire Western left was shocked at what Stalin was actually doing. Socialism being forced down people's throats by a dictator is not socialism. The roots of socialism is a functioning democracy.
So saying Orwell was shocked is saying very little.
And certainly not evidence of naivete.
He quickly caught on, 'Animal Farm' (1945), helped by his experience in Spain, while others in the West were still supporting Stalin's "socialism".
Although it should be noted that while Animal Farm is about Stalin's Russia the original preface warned of the same things happening in the West.
But not by a dictators force, through a "good education".