As a former 19A myself. I can tell you it's NEVER about which tank you use, its about the people and the team behind those tank.
There is a famous saying when I was in tanker school. "You are the one that make sure your tank is safe, the tank won't do it for you" Then when you look at how the Russian use those armor, they act like a bunch of morons who either go into battle alone, naked without infantry or disregard any formation and ram their tanks in a beautiful line or column.
If you are trained with Armour Warfare, the term you will use on most of the Russian Armour ambush video you see on YouTube is "Russian lack of tactical discipline" more often than not you see tanks that line up in a perfect "Parade Formation" getting ambush and Ukrainian manage to get close and have time to place well aim shot and destroy them one by one. Or travel alone like they got lost or something. You never travel in a hot zone in a neat formation, there are rear security, flank security and mutual support stance you have to consider. None of them are followed thru by the Russian. A neat line or double line column is great on Parade when you want to salute your general, it's not great for Battlefield movement. Because you are basically blocking each other view and it takes minimum reposition to destroy all your tanks, because frankly, you are helping your enemy by presenting your entire Unit in a neatly packed formation.
If that don't change, then I don't really care whether or not Russia uses T-90 or Any tank in the world, We can give them Abrams and it will still be the same. The person behind that tank is an idiot, it have nothing to do with which tank they use.