Without Russia's intervention in this conflict, this brutal war would have continued forever. 

USA and Saudi Arabia (+Gulf States) just wished for another regime change in the region. They supported and financed terrorists/extremists/mercenaries to accomplish their task. The death of hundred of thousands of civilians and Syrian government soldiers meant nothing to them.

There is nothing much to love about Assad. There is even less to love about the Islamic extremists winning (aka: "moderate rebels" by CIA).

They failed to transform Syria into the next Libya. For the time being.......