I agree here that school seems great. You might find out you hate it more and be able to come back to your job (or a similar one) with no real loss due to the GI bill. More likely, you will spark some passions and learn more about what you want to do.

Either way, I think gaining the perspective you have gained is great. There's probably far more jobs you don't want to do than jobs you do want to do, so finding out you don't like a job is not just normal/healthy but also very likely. Don't feel like you don't have any prospects, being critical is good and you just need to try more things (which school will help you do).