Shall I simply quote the propaganda patterns? "10. Whoever casts doubt on our propaganda helps the enemy and is a traitor." It's silly. And I think you're obviously not answering in good faith. Militaries who have the advantage in a conflict do not accept peace without significant concession. There's even a precedent for my hypothetical in this war. Early on in the conflict Ukraine was doing quite well, and it was Russia looking for a ceasefire, overtly to rearm and reman.
And at that time it was Ukraine rejecting any calls for a ceasefire without major concessions from Russia. They wanted the immediate and unconditional return of all land as a precondition to even beginning to negotiate, where they would have sought further concessions like reparations to agree to peace. And beyond that they were making statements, in public - let alone private, such as "[Russia] must be defeated, be subjected to a painful defeat, as painful as possible." [1] These are not the words or actions of a country that'd just agree to peace, without major concessions, if they were trending towards a potential absolute victory. But of course no country would. It's the nature of war. The side with an edge will expect significant concessions to end a conflict.
And, obviously a general mobilization would cause major backlash within Russia, but they'd almost certainly be just fine. They're not mobilizing because they don't need to. There's also no such thing as a "verified death count." Again going back to our propaganda list: "7. We suffer few losses, the enemy's losses are considerable." On top of both sides actively lying, they also likely don't even really know themselves, especially Ukraine. The overwhelming majority of their military is made up of forcibly conscripted people, many of whom would flee at the first opportunity. They certainly know the dogtagged KIA, but likely simply have no idea exactly how many of the missing are fertilizer, and how many managed to make their way to freedom. They also have a motivation to not know, to defer the KIA compensation payments.
[1] - https://www.euronews.com/2022/05/22/us-ukraine-crisis-podoly...