The other huge problem of democracy is that it doesn't account for human biases, such as the Donning-Kruger effect: people with high expertise tend to see flaws in one party or the other and will tend to not vote for anybody, while people with low expertise and knowledge buy any politician's lies wholesale and thus can be easily swayed by the best liar. So on average more liars get to govern us than good politicians.

Additionally, the other issue is that the best people with the expertise to solve a country's issues are exactly those that couldn't be bothered to get into politics. Likewise, career politicians tends to be absolutely inept and unqualified to run a country.

Democracy is the least worse form of government, but it still is very very bad.