Saturation artillery fire/saturation bombing against cities hasn't been a thing for the US military in half a century. So no, not "all through" the 20th century. Everything since then has been about precision artillery/individually-targeted buildings. MLRS multiple fire is sometimes used but only against open areas/bases.
The Russians tried that at first in February, but when it didn't get a quick victory they gave up and went back to their tactics of leveling everything, just like they did in Chechnya.
The US fights wars very, VERY differently now. The most buildings destroyed by the US recently was in Fallujah, but every shot was called in by a spotter of some sort. The reason so much was destroyed there was because so many buildings were occupied by combatants.
In the 21st century, the US has bombed only one active hospital (Kunduz). While the initial response from the military was unacceptable, it was also a huge scandal in the American media, and the US wound up formally apologizing and payed millions in restitution to the victims. (The US bombed a hospital in Mosul at the request of the Iraqi government, but it was inactive at the time -- imagery clearly shows ISIS tanks there, and there was active heavy weapons fire from the building.)
The US has bombed one other active hospital post-Vietnam, in Belgrade in 1999. While the US has yet to apologize for it, the bombing was widely reported in western media and condemned openly.
When Russia bombs a hospital it is not a scandal on Russian media -- it is only denials, if it's mentioned at all, and it never gets addressed.
And, by far the most ridiculous thing, the Russian state-controlled media talks near-constantly about how they are going nuke the western world in a first strike situation. No western country does anything like this. Not even China does. This is North Korea-level behavior.
So yeah, I would much prefer to be on the receiving end of an attack from the US instead of Russia. As a civilian, I'd stand a much better chance of survival.
And on the attacking side I'd ALSO much rather be in the US than Russia. During the Iraq War I marched against the war along with a million other people across the country, and the police didn't round us up for protesting (or even calling it a war).
So when the US does do bad things, we're free to condemn it. Our NATO allies are free to condemn it. When a war crime committed by US troops is discovered, it is the leading story in the US media. The leaker might be punished, but the information itself is not suppressed.
But ultimately that's still whataboutism and not really relevant to opposing what Russia is doing right now on its own merits.