Finally found something that fixed my messed-up garden dirt

My backyard soil was a total disaster after years of neglect and some questionable DIY composting attempts (yeah, don't ask...). Anyway, I tried this organic soil treatment stuff my neighbor recommended—honestly didn't expect much—but after a couple months, plants are actually growing again. Still kinda skeptical if it's just luck or what. Has anyone else tried these organic soil fixer-upper products? Curious if you noticed real improvements or if I'm just imagining things...