There's still hope hun, one thing that lot's of us uneven knitters have found to save our sanities, is just simply blocking the item.
Blocking evens out a lot of imperfections. Even with acrylic, you can even out the fabric with a quick toss in the ol' washer n nice fluff in the dryer (softens up that stiffness too).
With the woolen or other animal fibre yarns, just gently soak em in a little bit of sudsy warm water (DON'T agitate), rinse em in the same temp of water with maybe a little hair conditioner added in, then gently squeeze the water out, roll in a towel n squeeze out some more n then pin out the garment or whatever to the desired dimensions n let it dry. It'll be soo much easier to seam up if you have too and your fat n thin rows will pretty much be history.
Hope that helps ya hun.