I have learned from this, thankfully, and realize that corporate jobs fucking suck. I know I can be making more money than I do now but damn, if this is the way the world works, I don't want to be a part of it. That's kind of how the whole "killing myself" thing festered its way into my head.
Alright it's time to get serious OP.
"Corporate" jobs don't suck. Life isn't some Hollywood movie where you realize that you're a special butterfly and can go your own way. These jobs are filled with real life people that don't need to be actualized by your existence, they have shit to do that doesn't involve babysitting the new guy to make sure he feels fulfilled in his first 2.5 hours of work.
You stormed off the job because you weren't ready to face the realities of your new responsibilities. I've been behind a desk for the last 6 years of my working career and it's JUST AS sucky as any kind of manual labor. There is no magical job that is going to cater to your various insecurities about money and fulfillment and adulthood.
Do the best job you can while trying to get the most money you can while trying not to go insane from having a job you don't like.
You can't even say "this just wasn't for me" because you didn't have the patience or empathy to wait more than 2.5 hours before throwing a fit. You don't know if the job would have been exciting or compelling.
Now, having said all that, it's just one job. Get back out there and this time don't fuck it up by stroking your ego off to bursting in the inevitable wait to get set up.
Fuck.