I’m thinking the worst job would be housekeeper cleaning the Imperial Stormtrooper bathrooms.
I would imagine whatever droids have that job are programmed not to care.
I think whoever has to clean up the refreshers at Jabba’s palace have it worse.
Being a serf class in WoW, or in any fantasy world.
You are the bottom of the pecking order and most of society spits on you, despite you being the backbone of society. Evil monarchs and feudal lords can abuse you with no repercussions and most of your hard labor goes to feed the mouths of fat nobility and you are often starving.