Because if you spend enough time on the internet, especially the Western side, you start to hear voices of people who oppose their governments and not enough from those who support it.
Even many who are supportive tend to say that their government is authoritarian.
A lot of people in the west are trained to think "dictatorship" and "autocracy" are exactly the same thing. They don't understand that "dictatorship" is just "those who dictate the law."