The problem is that the main tool they use is also artillery, it is directed not by poorly trained conscripts, but by normal ie according to the Russians Elite soldiers.
The conscripts themselves are, to put it callously, a flesh-and-blood insert who live to die in place of normal soldiers.
Their job is to distract, stretch the enemy or provide cover. Otherwise the Russians are forced to use just as
@Marduk reminded me, paratroopers and so on.
What kind of morale they have is much less important, because anyway the main hard part of the army is not them, but the professionals who have certain methods to keep such in check.
Just for now, stop thinking that the American system is the one that is the only right one and look at how the Russians are doing it. For them, demoralized and incompetent soldiers were and are the standard for hundreds of years.
And yet they won, albeit at the cost of considerable losses according to our sense, but for Russia that was not as important as victory. If they won, then all in all nothing happened, and if they lost then how could you exterminate so many people in vain but even then it's not that much of a problem. Although it will hurt them more than usual today, it may even be their last war for a very long time.
You do realize that Russians have always surrendered en masse in wars to their opponents?
The Polish-Bolshevik war was like that, as long as they were winning then no, but when they got a beating they fled like rats from a sinking ship or surrendered to the Poles.
I'm reminded of an old quote still from the 17th century, that "a Moskal will not keep a field with you for all their cavalry beat each other like a swaggering heap."
Which means that they are a band devoid of morals and discipline which any Polish blow will smash.
As a result, it was not uncommon or strange how a few hundred Polish infantry were able to repel and smash a few dozen thousand Moscow infantry.
Ordinary cavalrymen, not the famous Hussars were able to fight and win against much larger Moscow troops.
Heck, the November Uprising of 1830 was a perfect example of how the small and select forces of the Kingdom of Poland were able to repel entire divisions of the Russian army that did not show off in that war. They won only because, for one thing, Russia had more men than Poland, secondly, the Polish generals as well as elites were then too handicapped to know how to win.