3)Elected leaders do not know the best interests of people
Actually they know but they don't give actions to what people wanted for their country. Since, they are the leaders of the country, they have what it takes to pass the law in the congress without asking for some ideas from those people who are against that kind of law.
4)Democracy leads to corruption.
Best reason for anti democratic country, yet not a great example to have in a country. It is visible in my country Philippines and it's viewed as one of the most corrupt country in Asia.
Democracy is great, but some leaders are greedy. And it leads to corruption.