Centralized democracy is indeed a complete failure.

I really hate an idea that minorities must live as majority wants. The assumption that majority is always smart and able to make wise decisions is completely wrong.

Unlike others, I actually think that some form of democracy exist even in authoritarian countries. I lived 22 years in Uzbekistan, then 9 years in Russia. I can say for sure that almost every dictator appeals to masses. Mediocre people (masses) is always their primary audience. For example, in Russia, tzar Putin perfectly represents mentality of majority of people in Russia. People actually love the style he speaks and acts. Dictator won't last long if he looses support from majority.
I wrote about this here:

https://www.quora.com/Why-do-people-living-in-totalitarian-s...

(I was surprised this answer got a lot of upvotes)

Also, I noted that even when masses don't like their current government's ideology, they jump to another mediocre idea.

For example, the mob in Uzbekistan is attracted to radical islam as opposition to current secular dictatorship. So if current secular regime in Uzbekistan will fall, then masses choose to go back to 15th century as an alternative. The mob in Uzbekistan certainly won't choose liberal market economy with highly developed technology sector attracting international capital. The backward silly ideas of islamic clerics are much, much, much closer to the mob.

Another example, next after Putin'ism in the priority queue of ideologies in Russia are: communism, and right next after communism is national-socialism. So there are a lot of people who oppose Putin because he is not true communist or do not fully support national-socialism. Again, there is no "liberal market economy with highly developed technology sector attracting international capital" in their queue of ideas.

I can't even imagine the masses go to the streets demanding relaxing regulations for businesses, reducing government spending, attracting international capital.

I guess in US republican party is relatively popular because of religion. Remove strong support of religion in the GOP and after that their popularity will probably drop 10 times.

In Europe, masses a bit smarter than in Uzbekistan and Russia but still they are demanding nanny state, taking money from high earners.

I spent a lot of time and effort to escape poor government policies supported by masses.
I born and lived in Uzbekistan, then moved to Russia, then to Sweden, then to the Netherlands.
So I'm not afraid to say to entire society - "fk off, you are all wrong, I'm leaving!".
I already did it 3 times!

For example, I left Sweden because of ridiculously high taxes and really big nanny state.

I see decentralized democracy as a solution.
For example, I would support an idea of small federal government and pretty independent states.
So that voters can vote for laws only in their states (with rare but inevitable exceptions).
It would be competition between states and eventually people with certain ideas would concentrate in particular states.
Some states would be more socialist, some more capitalist.
Head of federal government should not be a single person but rather a group of persons from each party.

I think Switzerland is closest example to this.

In such country, you can easily move between states with different laws, taxes, ideologies. It's far easier than moving between countries if you are disagree with prevailing political sentiment (what I'm doing right now).