Russian airpower made gains, the syrian and iranian ground forces are quite primitive and were struggling against a rag tag syrian opposition that had no airpower and nothing really then basic guns and anti tank munitions.
Hence why the war turned when Russia intervened several years into it. Not before then. But it was the advent of Isis that killed the revolution.
There was zero Russian air power in the battle of Saraqib.
Russia told Iran do not fight Turkey.
Israel gave location of HZ soldiers to Turkey leading to 8 HZ losses.
Saraqib was taken by HZ in one day.