How do most dictators treat their citizens?

That really depends on who is doing the dictating. It depends on what the aspirations of those being dictated to are. Benevolent Dictatorship has much to commend it as a style of government. I, being the dictator, tell you the populous what to do for the benefit of us all & you get on with it & tell me how wonderful I am & I reward you by telling you you are all marvellous people. It's all going swimmingly so far..... Vote for me: Jam for tea. (Thats jelly to you US folks) It might just catch on...... lol. I'm thinking the trouble is most Dictators are not quite as nice as I am. And voting for them seems to be not quite what most of them require. Indeed freedom goes out of the window very quickly. The straight answer to the question, historically, is not very well, especially when compared to what most dictators do to reward themselves & their relatives & hangers-on.