We all love the heroes of that galaxy far, far away, but should we? The questionable morality of the good guys is just one of many dark implications of the Star Wars universe. The Star Wars galaxy runs rampant with violence perpetrated by the light side just as often as the dark, making the lives of citizens in every solar system a constant nightmare. Speaking of those citizens, can they even read? Illiteracy, space trash, and inbreeding are a few more less-than-desirable realities all too present on their worlds.
If the Star Wars prequels weren't bad enough on their own, they're responsible for adding a whole bunch of disturbing wrinkles to a universe already swimming with chilling details. It doesn't take a deep look to see just how messed up the Star Wars universe really is. If you need something to pull you back to the light, feel free to check out Star Wars Easter eggs or the zodiac signs of your favorite Star Wars characters.
The Star Wars saga is so full of planetary destruction that we've almost become inured to it. It's why The Force Awakens had to up the ante by giving Starkiller Base the ability to destroy multiple planets at once instead of just one. While this mass murder is objectively horrible, it becomes even more amoral when the full scope is considered.
Not only are all the autonomous individuals of those planets killed, almost every single species is completely wiped from existence with the destruction of each planet. There are millions of species on Earth; any such habitable planet is likely to have a comparable number. With each planet destroyed, the galaxy edges closer to the extinction of billions of different species.
Is there any altruistic explanation for why droids should be created with the capacity to feel pain? The most glaring example of this are the soldier droids that, of all droid-kind, should be the last ones produced with the capacity to feel pain as they were built to have violent demises.
Beyond that, other types of droids clearly experience pain as well. C-3PO says "Ow" on the numerous occasions he's harmed, and we also see a droid being tortured in Jabba's palace by having its feet scalded with hot irons as it screams. It seems particularly sadistic to program droids to feel pain as, best case scenario, their "lives" come to an end simply being left somewhere to rust. Otherwise, they'll almost always be dismantled in some violent way or another.
In their final battle, Obi-Wan shouts to Anakin that his allegiance is "to democracy." While Obi Wan may have thought that, the Republic that he fought for showed little evidence of understanding how government or democracy works. For example, after Amidala was elected a Galactic Senator, she stepped down after several assassination attempts. When she leaves, she gives Jar Jar Binks, a random unelected citizen, her Galactic Senate seat without any sort of special election. She just says it. Jar Jar then uses that power to give Palpatine his clone army, setting the stage for the Empire to take control.
The Phantom Menace makes perfectly clear that soldier droids both fear for their lives and feel pain when they're sliced to bits with lightsabers. These droids crack jokes, shake in their boots about the Jedi, and emit sounds of pain when they're attacked as some form of comic relief. The larger implication is that while these drones that are essentially cannon fodder, they were also programed to feel any pain inflicted on them and fear their inevitable demise in battle.