Woah! Those are fuckin wackass bugs.
Yeah Will, it's taken me years and a lot of failed gardens. I've read a few books the last few years about soil biology... Basically you gotta build the right soil to grow microorganisms, the microbes create the nutrients. I'm not a great gardener by any stretch of the imagination but this is my first year starting everything from seed and it's looking pretty good.
I could get into it a lot or maybe not, but the biggest thing is light, you gotta have good direct sun period. Second is air to the roots. Good moisture. Gotta build soil. Don't be afraid of fertilizer, I use an organic one called 'milorganite' made from poop from Milwaukee metro sewage district, but at this point in the game you might want to hit it with something with free nitrogen, like miracle grow.
I started my garden from scratch last year and put a bunch of organic material in there, plus we had a really cool wet spring, the microbial activity sucked up all the free n and stunted the heck out of my plants, but halfway through the summer once the organics broke down everything exploded and grew like crazy. Not a great year but we got a pretty good yield all things considered. Have hope.