I think we've arrived at the point where Russia has suffered enough real defeats and PR black eyes that western nations are beyond backing down on their support. 3 months ago there was a lot of mumbling about European winter coming, dependency on Russian O&G breaking Europes back, Ukraine can't win a war of attrition against the much larger Russia, etc.
Fast forward and European energy security is fine, India keeps bending Russia over on progressively worse and worse export deals (most recent deal is 33 dollar a barrel discounted to Brent (which is 86 bucks a barrel today...so with discount Russia is selling to India at 53 dollars a barrel...their cost of production as of september was 44 a barrel fwiw according to internal Russian documents...but that's probably with some grift and theft built in to the cost) and Ukraine is winning the battle of attrition (slow gains in the strategically important luhansk region, already won in Kherson, gathering forces in ZAP for an eventual push) and all they've lost is a few miles of strategically useless Bakhmut.
The attrition aspect of the war has changed pretty fundamentally since the Donbas offensive you reference. HIMARS and other long range systems given to the Ukies have changed the way Russia has to operate their arty. They used to be able to just line up, smash a zone, roll forward, smash the next zone, onward and upward. The Ukies didn't have arty with enough range to do much more than delay Russian advances and make them bleed heavy once infantry came in to sweep up after arty barrages. But the Ukies have the ability smesh supply depots if they're anywhere remotely convenient to the Russians, which has stretched already terrible logistics to near uselessness. Doesn't matter how many more arty pieces you have if you can't get shells to them that allow for a high firing rate. Also the traditional arty the Ukies were given (M777's etc) now match or exceed Russian range with better accuracy, so even with less pieces, the Ukies can maintain parity. Rolling fire just isn't an advantage for Russia anymore like it was during the Donbas offensive.