Being an adult sucks. It doesn't suck because I have to do laundry, or go to work, or cook for myself, or that I'm expected to do things. All those things are great. I like doing most of those things. I like being responsible for myself. I like cooking my own food, picking what I wear every day, and all in all, I like being a grown man. Being a grown man beats being a kid any day.
Being an adult sucks because you realize most other adults are f*cking losers. 95.43% of all people over the age of 18 are god damn losers. They're losers now and they'll be losers forever. I don't need a source to back that up. Go outside. Spend 45 minutes conversing with other people your own age. Listen to the awful bullsh*t they spew as they justify the miserable state of their own existence. No plan, no job, no car, no money, no anything. And it's always someone else's fault.
And it's only getting worse.