Evil always has the upper hand in controlling the system because evil people have access to a far broader range of tools and techniques to achieve their goals since they don't need to concern themselves with moral or even legal hurdles. Evil can pull the trigger with ease whereas good hesitates; that's why evil has the upper hand.
Your philosophy is shared by all the people who committed the most evil acts of the last century. All of them have tried to stamp out the “evil people” in their societies. They only disagree about who the evil people are.
I suspect that many of the attempts at social cleansing are natural (though not necessarily just) reactions to other less visible evils carried out over longer periods of time by those in power. Clearly the Bolsheviks in Russia were not happy people... There was a process that had been occurring for centuries prior which made them unhappy enough to carry out a revolution. It is known that Russia's feudal system had been particularly harsh on peasants for centuries.
The French royals were so detached from the misery which they caused that it seems somewhat unsurprising that they couldn't even keep their heads physically attached to their bodies in the end. Their metaphorical heads were already quite detached from reality before the guillotine made the separation literal.
I’d similarly argue that some people are much more good (in the sense that their work actively makes society better). Their concentration is also higher near the centers of power. An awful lot of people go into government out of a genuine love of their country.
What do you think happens to people who want to do good by approaching positions of power? In my experience, friends who became teachers or cops, they either became evil/abusive themselves, or they were pushed into depression by social exclusion and either left or killed themselves. These are some of the jobs with the highest suicide levels, precisely because some people came to do good while realizing the systems in place made it entirely impossible.
What data are you using please?
https://blog.francetvinfo.fr/l-instit-humeurs/2019/11/09/cha...
As for the cops, there are a few statistical/sociological studies. I may have exaggerated claiming they are the jobs with the highest suicide levels, but they do have higher suicide level than the general population.
https://www.liberation.fr/checknews/les-policiers-se-suicide...
Anecdotally, what the article doesn't mention is that, at least here in France, it's not uncommon for cops committing suicide to actually kill their wife and children before killing themselves... which i believe is a rather unique feat of their profession, but as there are no official stats on the topic you should take this claim with a grain of salt.
There is a lot of denial like "No, that's not possible, such and such would never do such an evil thing, what would they gain out of it?" The fact that you're a good person may be the reason why you do not see the motive or do not understand its significance. Some people really want total control, they want it really really badly. They could be a billionaire, a president and yet their first for more power is stronger than a person lost in the desert thirsts for water.
Royalty does not necessarily cause misery, Sweden, Spain, the UK are all monarchies. Colbert and Louis XIV built a lot of foundations that you know France for today; even later non-democratic regimes such as the Second Empire (Napoleon III and Haussman) structured the Paris that brings tourists the world over…
The French revolution - that I know of - led to the invention of restaurants because rich people from remote cities came to Paris and wanted to live the fastuous life they envied from nobles. Social cleansing? Nothing of the sort, social exploitation as always, from where money and power came as always.
It is always thus; one must belong in order to revolt. In fact that was successfully exploited by the Swedish King in the mid 16th century by wiping out a significant chunk of disaffected aristocrats to form a moat between the monarchy and the classes that couldn't afford to revolt. A similar strategy was taken by Louis XIV by forcing the aristos to move to Versailles away from their intrinsic power bases. Of course in bot cases this just delayed things and the middle classes formed alliances with aristos and overthrow those regimes too.
You see this also in both competing sides of the Chinese civil war, Viet Nam's and India's independence movements, the Bolsheviks, US revolution and its civil war, etc. The hagiographic retellings always emphasize of the popular underpinnings in order to try to establish or maintain legitimacy, but it is never the case.