I have hand sewn quite a few belts made from two layers of 8oz saddle skirting and yes it is a pain in the butt. I am, however, glad I made them. After making a few belts, sewing almost any other project by hand is a breeze. Even though I now use my sewing machine for belts and knife sheaths, I know that I can hand sew anything and do it to a high standard.
I will probably hand sew another belt for myself before the holidays. I have built a stitching horse of sorts just for stitching and finishing belts that makes life a lot easier. I mainly use it now to hold belts in place for finishing the edges. It's the big "T" shaped thing on the left.
I don't use an awl to punch holes however. I use a large needle chucked in my drill press and make the holes that way. The needle does not cut the leather like a drill bit would and it makes perfect holes. I have, by trial and error, determined which size needles work best with which size threads. By pre-punching my holes and using my "stitching horse" I am able to hand sew a belt fairly quickly with a lot less trouble. Using a quality linen thread, properly waxed, in the correct size holes, makes a really nice tight hand stitch. I have never had a problem once I settled on the method that works for me. Not everyone will agree with my sewing method but I think you have to find what works for you.
Happy Sewing,
Nick