I don't see any proof that representative experts are better.
I would have thought that it's pretty self evident that laws which affect the citizens of an entire country should be made by a group rather than an individual.
Pretty much every country has moved away from dictators or kings towards some form of representative democracy.
Societies are much more complex than they were when a king ran things, no one person can understand enough about it all to make informed decisions. That's why you have different departments in charge of different areas.
As for "one side of the other", that's a bit of a US problem where your population and government are so polarised between the two sides.
Things aren't much better here although I don't think the division is quite so extreme.
The fact that the four years of incompetence has ended shows that the system works.
You're now talking about a different system - one where there are regular elections which can change the government if the population decides they want to change it.
We have that too, you know. That's not some unique feature of US democracy, most democracies have that. We changed our government last year.
Some would say we just changed from one lot of incompetents to a different one, but that's a different issue.
We have our problems, certainly, but we're the 6th biggest economy in the world which given by population we're just outside the top 20 in the world we're doing OK.