The Jedi were Masters of a slave army, and Clone Wars made it clear that they were treated as deserters if they tried to escape the army. They are pretty horrible actually.
The entire Republic was a corrupt hell hole. The Separatists were in fact correct in their Assessment that the Republic needs to be shattered into 1000 pieces. They just did not realize that their own leadership was corrupted as well.
One of the key features of the Clone Wars is that neither side were entirely in the wrong, and neither side were entirely in the right.
The Republic Senate was almost hopelessly corrupt, mostly because of lobbying from the commerce guilds to decrease/eliminate taxes and levies on their trade, deregulate business and banking practices. You know, the kind of stuff that only serve to enrich the elite and the unscrupulous, mostly enriching the already fat and complacent core systems.
The thing of it is that the Seperatists were no better. While the people of the mid-rim and colonies were likely sold on the message that their voices weren't being heard and that the Republic was hopelessly corrupt; The people of the core were equally sold on the message that the Separatists were out to destroy the Republic and take everything for themselves.
Indeed, both messages are essentially true since for many in power within the Separatist Alliance, the motivations were much more selfish than the official line. They wanted more wealth and control for themselves, to be able to have their own little fiefdoms without of oversight of the Republic stopping them from doing whatever they wanted to line their pockets.
This is how Palpatine was able to puppet both sides; he deliberate split the Republic into two camps that were both a mix of idealists and opportunists. For every Bail Organa or Mon Mothma, the Republic had a Orn Free Taa, for every Mina Bonteri or Avi Singh, the Separatists had a Sanjay Rash. Both sides had people dedicated to making the galaxy a better place, both sides had people actively trying to enrich themselves from the conflict.
It's no accident that both sides used disposable soldiers on the front lines. No body bags being sent home, not grieving families or crippled veterans to hamper support for the war . . . and as a nice bonus, nobody to report back about war crimes. Plus it was a handy way to test out is clones or droids would make the best Stormtroopers for the Empire (wheels within wheels and all that.)
So yeah, the Republic was riddled with corruption and needed *massive* reforms, but the Separatists were just more of the same. Hell, they jumped right into bed with the very commerce guilds that were the cause of most of the corruption in the first place!