It's a real shame the USA was so cavalier with white phosphorous bombs in the middle east or we would be able to properly challenge Russia on using them
Russia's advancement tactic is basically "level it with artillery, they can't take up a defensive position in a pile of rubble"
Incorrect.
People love to tout the line about Trump loving Putin, and it's quote true he has praised him many times, however it didn't stop him screwing Putin over hard when the opportunity came up as pwning the strong man made him look like a super strong man.
One example is when Putin decided to go into Syria and be a badass, and Trump decided to blow up a Syrian base full of Russians so told Putin to get his guys out but not to warn the Syrians/Iranians or he wouldn't get a warning next time. It made Putin look like a total wimp in the eyes of the Syrians/Iranians who he was tring to flex to.
Another example is when Putin convinced Erdoğan to buy S-400 SAMs (a decision I'm sure he is in no way regretting now lol), and Trump threatened to eject Turkey from the F-35 program if they went through with it, they called his bluff and he followed through. Destroying Putin's plans for increasing/expanding his weapons industries reach as it was now written in stone that you can't be a US customer and a Russian customer, you have to pick and most of the countries Putin had been courting decided to go/stick with team USA.
And then of course you have the huge example that Trump was president for four years and in those four years Putin didn't invade Ukraine, yet the first chance he got under the Biden administration he was straight in there, and it wasn't because he was busy preparing as the time favoured Kiev more than Moscow.
So yeah, I stand by my opinion that there's a quite considerable chance Putin would rather spend the next four years dealing with an adversarial yet consistent Biden than having a loose cannon wrecking his plans again.