The whole campaign revealed that the "number 2 status" of the Russian military has been a big overstatement, primarily driven by Soviet-era reputation and nuclear weapons. The marketed new toys are very scarce, most of the equipment is old; military strategists utterly failed in their planning; most soldiers are undertrained.
Wasn't the figure of Russia being 2nd Military Power before US came from Globalfirepower in which their methods of ranking is questionable at best?
And it's quite common for a large military having most or some of their troops as undertrained, it's usually because of the State only cares about the number, because Big Number = Intimidating, also considering the fact that Russian military expanditure is very miniscule compare to the Big 2 (China and US).
About the new toys, same can be argued with its military expanditure, and some of them has been used in the conflict currently (like T-80BVM, UGV, UCAV).
T-14 Armata main problem is the cost of its tech, Russia still producing it in smaller numbers and i think they will mass produce it when the technology within the tank is already affordable and much cheaper.
SU-57 Pak-Fa from what i can see is a dead project, some of it's specs had some problems and bugs, i think this is the reasoning behind the new SU-75, because SU-75 from what i can see was a simplified version of SU-57.