Sorry for your results. An fue with 6000 grafts is considered a megasession more than enough to give you full coverage on the front and the midscalp. In your case it looks more like 2500- 3000 grafts on the front and midsector. In my opinion the survival rate was poor, that means either the grafts were damaged by the procedure or you had a lot of miniturisation and the grafts simply didnt survive.
You can still hope for an improvement in the coming months.