I feel like you might just be having terrible luck? Playing through as a pistoleer/crafter, once I got past level 12 or so there was simply no way for the weapons I found to compete with what I could make. It's true I had to hunt a bit for the best quality frames, but MODS are what tip the balance. I never, ever found a pistol with the rapid reloader on it, let alone both the rapid reloader and the laser sight. Being able to fire my extra-accurate .44 three times a turn without taking Gunslinger is something I would never have been able to do without crafting, and that gave me FAR more offensive potential than a few extra base damage points from a higher quality frame.
Crafting is incredibly powerful, it just isn't explained well in the game itself. To get the most out of it you need to scour the wiki for what each component does precisely, figure out what configuration of mods is going to work with your build to give you the most advantage, AND be willing to do a lot of walking from vendor to vendor to find what you need. And some of those steps are tedious, but in the end, you will profit immeasurably from it. With that in mind, I'd support having vendors offer a greater variety of components, but *not* nerfing the quality of findable weapons. They are already less powerful in enough ways.