Why Russia's military is bogged down by logistics in Ukraine

[brooklynite]

Washington Post

Ambushed convoys and broken-down tanks. Generals killed close to the front. Long-expired rations. Frostbite.
Russia’s military was built for quick, overwhelming firepower, experts say, but its weakness is logistics. And on the roads of Ukraine a month after the first invasion, that weakness is showing.

Many analysts say the Russians assumed they would quickly capture the capital city of Kyiv and force President Volodymyr Zelensky out of power. Whatever the strategy, that outcome did not happen, and Russia has been bedeviled by an inability to keep supplies flowing to troops in a longer ground war.

After weeks of little success except in southeastern Ukraine, despite relentless shelling and thousands of military and civilian casualties, Moscow said during peace negotiations on Tuesday that it would “drastically reduce” military activity in the northern part of the country, near Kyiv and Chernihiv.

[Sherman A1]

1. The problems of the Russian army are numerous

but, they apparently really didn't plan on this being any more than a few days to a weeklong operation. If the "plan" tells you that it isn't going to be more than 3-7 days, why would you bring 4 weeks of supplies?