Pretty much every Russian military telegram channel is saying the same thing. If Russia agrees to a surrender deal now, it is finished as a country. I agree, in fact if they agree to this deal I think China should join in on the western sanctions against Russia.
I don't even think a coup is an option at this point. There would be too much political instability for the war to continue, and China will be blamed for it.
Starting a war like this is very risky endeavour, but if you aren't prepared to fight it 100% it is going to cost you.
Hopefully the Russians see sense or this is all dumb Russian mind games.