To be fair, this looks like 3,000 grafts on this large area.
There are some patches that look like subpar growth. But its not a total failure. I think the problem is there wasn’t enough grafts placed in this area.
I had a podcast with Dr. Pittella, he talked about a case that looked relatively minor in comparison to your case and he required over 6k grafts. I think you probably need at least 10,000 grafts.
I think this might give you a better idea of what’s necessary.