Russia had been excepted to fold Ukraine easily and not cos famous mantra about manpower numbers awailable.
1. Unlike Ukraine, Russia had modernized their air forces , so they were technically superiour vs ykr ...plus ofc number of helicopters and jets awailable : considerably more than ukr might had to dream about.
Their superiority in aviation actually might not get calculated just from bare numbers, also from upgrades their even USSR era jets had ....
Literally maybe 25- 35 vs 1 superiority...
Significant superiority in air defense , where Ukraine had degraded their potential during 30 years in row despite loud talks....
There russia unlike Ukr had invested damn a lot during 30 years in row...
Tanks.
Ukraine had significant disatvantage vs Russia not only cos their de facto de militarization ....where from 4200 main battle tanks in late 1992 th at least on paper in working condition...
In february 2022 th after shit had started ....ukr admitted that they on paper does have lesser than 900 main battle tanks on paper in working condition.
Majority of these were not upgraded and ukr rushed to attach USSR 1980 ies era Kontakt 1 old design reactive plates ...after war 2022 had started....
Ofc they had some modernized tanks and these advertized Oplot etc...
While in reality appeared that more than 50% from their tanks were not upgraded T-64 and T-72 in condition like they never had saw any upgrade after 1992 th.
So yes, obiviously ukraine thus far had did considerably better than it had been excepted...