Slow progress is better than no progress. Atleast the game is not abandoned, he might have personal issues or he might be lazy, no matter what you type here, no matter how much rage you show here… he is gonna work on his own pace. So let him work in peace… he makes you wait but he does give you quality content… look at those details on those renders, it actually does take time. So just wait and motivate him, rather than giving him some virtual disease
I still dont understand why that guy gives deadlines, just progress and update when the game is ready.