I haven’t read all the replies, so FWIW, I’ll say this:
The OP made a rash decision to join the USAF. Now, the OP is making a rash decision to leave the USAF.
OP, I will say this to you: as we grow, we find that we need to live with the consequences of our decisions. I bought this car, which may not have the gas mileage of that car; but which carries what I need it to when I need it to. I got this degree, which may not be immediately useful; but some potential employers will recognize my accomplishment. (And they have.)
Somewhat similarly, you need to realize that for some reason, you signed up with the USAF. There was something there to attract you. Why not the Navy or the Army? No, something about the USAF attracted you.
So you signed up for the USAF. Good for you, and I say that as a non-American. Because now, you have a job, and the opportunity to learn a trade, or get a degree, on the US Government’s dime. It’s up to you. Now, you need to “man up” to your decision, and go through with it.
If you leave, where will you go? What will you do? You may have good and valid answers; but I suggest that you do not. You are, as we all were when we were 18, pretty stumped by being handed adulthood, but not quite knowing what to do with it. So your job, right now, is to make the best of it. Commiserate with your squad–yes, your DI is an asshole. Shout “Sir, Yes,Sir,” when you need to. Polish your shoes and your brass–honestly, I don’t know, I’m going on the movies–but from what I see, such petty things will help make you an airman, and an adult to boot. I really don’t like saying this, but grow up, grow a pair, and see where the USAF will take you. It just might surprise you.