If your bones aren’t consolidated it is a reflection of your nutrition or sleep deficiency. Some people’s body naturally produce more, you probably have a calcium or vitamin d deficiency stacked with you not eating the right vitamins. Do you go out at all? You realize exposing skin to the sun is how your body produces a lot of it’s vitamin D. Drink milk, take calcium and Vit-D supplements, sleep good and your bones should consolidate, a few months is plenty of time
Don’t do nailing; you’re already at the end why would you drill through your knees and bones when you’re already at the end thats pure stupidity. And on top of that you’re risking knee pain and paying 6k euros
This is the best advice you're going to get here. You and I are as you know quite comparable in our stages of recovery, but my bone growth seems to be way better. If I was you and my bone growth sucked, it is 100% a nutrition problem. I think I'm much older than you actually. I'd do this:
Start eating absolutely as many fruits and vegetables (specifically green ones) as much as you can. Spinach, brocolli, onions, and eat a lot of them. So much that your pee is neon. 1 protein shake will do nothing. You need vitamins and minerals, and almost entirely mostly vegetables. Lean meat like chicken is okay, a good diet drives it all. Eat complex carbs, no white bread, naan, lavash, if it's white don't eat it. Wheat and grain heavy with grains and brown or dark as it can get. Eat until you crap all day.
Start banging the pavement with your legs a whole lot more. Get super comfortable shoes and walk, walk walk. Wrap your ankles so they don't get swollen. I made this mistake that I didn't walk enough. Don't touch any NSIADS. And when you're not walking, use an electro stimulator if you can find one. Take it very seriously.
Man you are literally at the edge of it, you're almost there. We'll do it together.
I need you to lay out your full eating program and exercise. Let's figure it out and get you out of those fking frames together.