the referendum probably shouldn't have happened at all. We, the British people, were systematically misinformed from start to finish and when they ran out of things to discuss they used fear and hate to get us to vote for positions we didn't understand. It's a lesson in how not to run a democracy at least.
The thing is that manipulation of people to vote this or that way is a necessary evil of democracy. It's going to happen no matter how well the democracy is run. The other important question to ask is whether democracy is worth taking that risk for.
In my view, in less educated countries, there should be more constraints on democracy so as to be extra sure that the will of the majority can't override justice, (non-voting) freedoms, or the safety of any law-abiding citizens. This is especially true of religiously conservative countries, like several countries in the Middle East.
Do you feel comfortable with one party states if they were composed of experts?
Not at all. Experts can still be biased, and sometimes dangerously so. Even under a benevolent dictatorship, I'd want political and ideological diversity.
The U.S. is an example of why a one- or even two-party system is a practical failure.