1) Pointless if you want to go to a top school. I don't go to one, so
2) Most dual enrollment programs restrict what coursework you can take. Near zero intersection with my CS coursework, though I did get my general ed requirements done.
3) It's community college, it's not something you can put on a resume.
With the credits I got I'd need to do a heavy schedule to graduate even in 3.
I agree with @akhilcacharya and had the same reasoning (ended up not doing the AA in high school for the same reason).
More restrictive set of courses for the AA means you're taking classes you don't enjoy for a requirement you don't need. The "name value" of a community college AA also isn't as great, particularly for kids who want to go to a higher-ranked public or top private university for undergrad.
That being said, if you know you want to go to a local/state school where the credits will transfer easily, getting the AA early can be great. I know people who graduated early but still received all 4 years of scholarship money (direct deposited in their bank).
What did you find non-useful about it? Did you end up having to take just as much undergraduate coursework to make up for some perceived deficiency?
I'm genuinely curious.