I only do a 50/50 mix when I make wheat bread. I do also add extra gluten.
I've tried a couple things. One is to either use extra yeast or double the rise time. You have to be really careful in the second rise because the whole thing may collapse on you.
If you google no-knead bread, you'll see instructions for cooking in a dutch oven with a really wet dough. If you let the dough rise IN the container and then heat up the oven so you don't disturb it, that might help. When I've tried to move the loaf into the oven I always have trouble making it look good.
Oh, and try different brands of whole wheat flour! King arthur is really good. I got some at aldi once and it wasn't usable for bread. I had to pulverize it in a blender and even then only used a bit for muffins or cookies.