They are some tough motherfuckers
What they have accomplished is little short of miraculous. That said, I think the worst is yet to come. Russia realized they were spread too thin to maintain all their supply lines, and that they had left themselves too vulnerable to ambushes from many directions. I feel sure that they will simply try a different strategy, perhaps by concentrating all their strength in one column in the east and overcoming Ukrainian territory with a blunt force approach, moving their line of control forward inch by inch, keeping supply lines open behind them, and thus eliminating vulnerable left and right flanks, until they power back to Kiiv.
I think the Ukrainians anticipated that exact strategy when they took out that fuel depot in Russia, near the Ukrainian border. They have to make it as difficult as possible for Russia to supply their forces with fuel, food and reinforcements.
If the Russians had run that play in the first place, they might have controlled half of Ukraine by now, but the strategy won’t work as effectively now because the Russians have lost a lot of equipment and the Ukrainians have had time to prepare. I’m guessing that the Russians originally felt it unnecessary to use such a long, drawn-out approach to get to Kiiv. They probably thought they could take the capital easily with their original strategy, then replace the government with some of Putin’s lackeys. It also appears that they thought some Ukrainians would welcome them and/or fail to resist. If there was ever any chance of that, it is now gone. Since the Russians started bombing civilian targets, the Ukrainians have become solidly unified against Russia, and totally convinced that they don’t want to be part of any country where the leadership indiscriminately kills children and bombs hospitals. Putin has convinced the Ukrainians that being independent is not just one of the many rational choices, like Puerto Rican independence, but is something worth dying for.
It has been a good month for funny men. Zelensky and Chris Rock have demonstrated that comedians can be as tough as nails.