SOL Firm Latex mattress hurts the heck out of my lower back

27, 5’8 160lbs. sleeping on the god damn floor is uncomfortable, but it doesn’t hurt my back like the SOL firm mattress does. 5 mins on this and i already feel nerve pains in my lower back. I tried a medium 3 inch topper from them and it helped a lot but i still have a bit of lower back pain.

I really like the cool sleeping of latex but this pain is unbearable. How is it possible that a firm mattress tweaks my back this much??