And who is facilitating as well as allowing them to have high position in Empire's admirality and Moff councils to begin with?
Let's not forget that out of 12 Grand Admirals (which are all appointed personally by Sidious) only three or four of them are worthy of their position. The rest are nepotism.
Lets not forget that CIS are basically Sith's design. Without Sith it will be just Trade Federation.
Without Jedi or Sith the galaxy may still be in turmoil, but they certainly are the ones that makes those warlords and other opportunist have the opportunity to do what they did.
None of this proves that the Force must be destroyed. The suffering in the Imperial Civil War isn't caused by the Force. The suffering caused by the invading Mandalorian Neocrusaders isn't caused by the Force. Any conflict in any part of SW verse isn't caused by the Force itself.
Palpatine with or without the Force. The Imperial Civil War would still happened. The treacherous, disloyalty, disunity, flaws, and so on of the Empire isn't caused by Palpatine's force powers but rather by who he is as a person which is being a megalomaniac tyrant.
The Empire is structured in that particular way as such by Palpatine, not the Force. If anything, if Palpatine is good natured, cares about the well being of the galaxy, and so on. The Empire would be structured in a way that doesn't allow a Warlord era to ever happen such as putting loyal and good men who cares more about serving the people of the galaxy in position of power as opposed to having a den of power hungry people in the same room.
The Force didn't cause the Empire to fracture. It is Palpatine's evil nature that allowed it to fracture. The Force isn't causing this.
Whatever evils that had been done is done by the people themselves, not the Force.
Take Darth Revan and Darth Malak for an example.
Both are very deep in the dark side. But we can see a difference. Revan prevented as much destruction in his invasion of the republic. While Malak just simply bombards everything in his path. The thing is that you can't blame the dark side of the Force for this. What is being seen here is differences in who they are as a person. Not the dark side.
Same goes for the light side. The Mandalorians wars in which the Jedi council prevented the Jedi to partake in the war. This isn't the fault of the light side because the light side by definition is defending the weak and the innocent.
The Jedi Council refusing to partake in the war isn't the light side failing. It is rather that they are betraying the essence of what a Jedi is meant to be. They are betraying the light side.
Had the Jedi Council followed the will of the Force which is the light side as opposed to not joining it. They could have prevented Revan and his band of Jedi from falling way too deep into the dark side. The council could have override the brutal tactics that Revan would employ and compensate it with more Jedi in to the fray. Heck, they could keep Revan from using dark side artifacts made by the Rakata such as the star maps and whatnot.
If only the Jedi council just simply just joined the Republic, jumping to every opportunity to protect the innocents and kept a constant lookout for anything that would influence Revan or any of the less experienced members to the downfall to the dark side. That would be the light side thing to do. As opposed to sitting in their temple and only evaluating the threat. This can explain why in KOTOR II, when you use Force vision on the Jedi Council members, they aren't fully light sided, only partially. A true light sider is a paragon compared to these clowns.
The same thing applies to the Prequels. The Jedi are flawed because they are more concerned with dogma, follow the will of the Republic. As opposed to following the will of the Force. If anything, the exemplar Jedi would be Qui-Gon Jinn who follows the will of the Force through and through even in defiance of the Jedi Council.
The light side is about helping the weak, forgiving of their mistakes. If only the Jedi had helped Anakin's mother. If only the Jedi forgives Anakin of his flaws as a Jedi as opposed to belittling. Perhaps Anakin would have sided with the Jedi and not Palpatine.
So no, the light side can't be blamed for the Jedi council's arrogance and the dark side can't be blamed for Malak's genocide as other dark siders such as Revan who prefers to avoid as much destruction as possible in his conquest of the Republic.
The dark side doesn't compel everyone to seek the total annihilation of the republic. There are those who are content in ruling their own little private fiefdoms without caring the larger galaxy.
The same goes for the light side. It doesn't compel all of them to be in blind defense for the Republic. There are those who are content to live in isolation and don't want to involve themselves with the rest of the galaxy.
Every war between Jedi and Sith isn't the fault of the Force itself. It is rather individuals participating in those wars.