regultr and I are the same height, so he and I talked a bit via PM.
When I first got mine, I felt pretty much the same as he did. Eventually, what I found was to use my extra clothing as a pillow in the hammock to get my face up around the seam of where the bottom material and the bug netting are sewn together. This helped me a lot not feeling like I was in a coffin.
I also have found that if I hang mine just slightly feet up, then it's pretty nice as well.
Another thing might be to put an inflatable pad in between the 2 layers. I tried this early on, but decided it wasn't for me.
Persistence and experimentation is perhaps the best advice I can give at this point.