Despite Black’s horrible bishop at d5, he has at least a perpetual check because of the weak square at g3 unless White reacts properly. Also note that black has pawns permanently fixed on the white squares b5, c6, and e4. Why is this such a big deal? Because the black laufer will have blocked thoroughfares/diagonals in all endings AND to borrow a Hans Kmoch term suffers from acute melanpenia!
What in the hell does acute melanpenia mean? It means that Black is irrecoverably weak on the dark squares in all end games. All of this excessive terminology means that White would be well served to trade off his Queen and possibly Rook for their Black counterparts and infiltrate the second player’s position on the dark squares with his King. This would likely lead to a Zugzwang position winning for White. In the middle game, melanpenia or insufficient control of the black squares might not be as noteworthy.
Conclusion: If the first player makes the move Qd6 guarding the ultra sensitive g3 square, a heavy piece liquidation will probably ensue steering towards aforementioned endgame! BTW, after Qd6, Rf3?! fails to Qd8 and Qg5 check!