An example of something that I think is a sign of democracy:

A political leader does something wrong: He is corrupt and people find out about it, or he is just bad at his job. People get upset, and he is forced to resign. That happens regularly in the UK, for example.

Some examples: Politicians were "fiddling their expenses" in a major way, claiming tens of thousands of pounds in expenses that they were not entitled to. A female labour politician who said she was was a socialist and a supporter of state schools, but sent her own children to private schools. A politician instigated a very bad change to rubbish collection in the city, causing lots of problems for local residents.
They had to go.

UK is not a particularly good example of democracy I think, but people do not tolerate obvious corruption or incompetence.

However everyone here says that in Russia almost every politician is either corrupt, or incompetent or both - and nothing happens.

From this perspective, I think the UK outcome is preferable.

In the UK a lot of "corruption" happens between the government and private business, and it is very hard to prove that it is corruption. A lot of the time, this benefits the economy and even when such scandals are revealed, people don't care enough about it.