it really depends on who you define as the sith.
the sith were really a species on korriban minding their own buisness until one day, some dudes come out of a shuttle and give such an emense display of power that the sith became totally submisive. did they want to become power-hungry monsters thanks to these few rotten eggs? probably not.
Now from the imperial trooper's perspective:
he or she could be at home on corellia watching the huttball finals, but instead they are marching around gloomy starships and invading innocent worlds, hated by everyone, being torn appart by the republic's soldiers.
And if we go deeper into the future, we come upon the stormtrooper. they have to walk around the death star, torture people, invade peoples homes. all for a sick twisted weirdo. they could be home on alderaan, drinking a smoothie and playing with their family, but they are on the death star, standing in uncomfortable armor, watching everything they know explode and not be able to say to a fellow mourner, "Leia, i feel your pain. i'm alderaanian too."
So really it depends who you take for the "sith". the real evil ones are the bad eggs like malak, revan, malgus, and palpatine.