Russian Army one of the best trained and highly disciplined militaries in the world

Is it? Their paratroopers were shot to pieces once they landed near Hostomel. And at the end their attempt to take Kyiv failed.

their entire chain of command would be absolutely furious if any of their subordinates handed the west a such a ridiculously stupid propaganda coup by murdering civilians for no reason and that is not even to consider what Putin's reaction would be and this is the main point

Putin doesn't give a shit about Ukrainians and his military doesn't either. Stalin tried to genocide the Ukrainians.

Do you think all the reports, photos and videos of civilians getting raped, killed and being buried in mass graves are fake?

https://www.thesun.co.uk/news/18222506/russian-soldier-rapes-baby-ukraine-war-arrested/

https://www.theguardian.com/world/2022/mar/27/russian-soldiers-raping-and-sexually-assaulting-women-says-ukraine-mp

They are animals. This is how they behave when they invade a country. They invaded my country in 1968 - they looted, raped and killed our people.

the damage they did to Russia's reputation

Their reputation wasn't great before. My guess that from now on Russia will become a pariah, just like North Korea is.