no, the biggest reason is neither, it is the resentment, feeling that nobody actually cares about ruzzia and its role, its status, basically not being the big scary ruzzia, the bear that the ussr was. While their own lives are small, insignificant, unimportant, at least these russkies feel that this war puts ruzzia back at the global stage to be the center of attention. They first felt it back in 2014, when putin orchestrated taking of Crimea and part of Donetsk and Luhansk regions. Now was the second wave of this, but it is coming to an end, cannot keep feeling this elation, while your "big and scary" army has been stuck taking yet another destroyed village who knows where in Ukraine. While this didn't matter much earlier, before they really felt it themselves, now they are starting to feel it slowly, as inflation keeps creeping up, their oil refineries and now shadow fleet tankers are getring hit. I was in Kiev for a week, the city lives mostly on generators, but people keep going. I saw drones and anti drone fire, anti missiles hitting ballistic and cruise missiles, flashes of explosions in the sky. The ruzzians are starting to see these as well. Their cities will be living in the dark this winter too, lets see what that does to their attitudes.
In any case, there is and was huge support for this war on their side because they felt pride and at the same time they did not feel the consequences. Lets see what happens to their pride when the consequences hit.
I will add that there is this concept of the "good ruzzians", some who live abroad and are vocal about hoping to see putin gone and a regime change. It still doesn't matter, they hope to see a different ruzzia restored, returned back to the world stage under a different umbrella, paying its debts and such. I do not accept any of it. ruzzia is a death zone, all of its culture is the real death cult with never ending imperial ambotions, it can change colors, it cannot chamge its nature. It needs to be taken apart and it will be, it is inevitable now. With muslims taking over moscow, Chinese taking over Siberia, Kazakhs have some claims, Finnish have a large territory to reclaim, Ukraine actually can claim quite a bit of land, in 10 years time we will see something else and it won't be ruzzia.