Why Russia isn't using it's full force in Ukraine ?

Why the russians are allowing the ukrainens to win ... they had Kiev in their hands and then they retreat ,it makes no sense,tactically it makes no sense ... as a general i would have bombed Kiev like Mariupol or worse ...

Russia has a lot of resources ...ammo never finishes for russians ...you had Kiev in your hands why would you give it back ? ...no sense ...


https://www.aljazeera.com/news/2022/3/2/why-hasnt-russia-mobilised-its-vast-air-power-against-ukraine