So... what's your complaint exactly?

Is it that he's spoiled or that he's a slacker on the housekeeping?

If it's A, then i'd say stop spoiling him (cause you're doing it right now!), and if it's B, then i'd say give him time... allow him to live on his own, in an apartment, drowning in his own filth for while. Sooner or later he'll learn the benefits of a neat house. He'll especially learn those things once he realizes that the time for slacking off and living in messy places has come and gone, and that at this time in his life (whenever that is) having a messy house doesn't say anything about you other than that you're a slacker, and that's not a good thing.

So yeah, give it time, and stop spoiling him ffs. It's not cause you drop out of college that your life is ruined. It'll just take longer to get back on track, but guess what; that time is going to be full of valuable life lessons, including the one about how you were a spoiled brat before.