for a start ....NATO has undersupplied Ukraine to have much much less than russia ...still haven't given them any decent aircraft and has taken a long time to get what things they are now given - only a small fraction of NATO's economic clout
while rusisa has been operating on huge military reserves built up over decades (and which are now very depleted ) first year of war was OK for russia , not now !
record weak rouble and 15% official interest rates don't lie - russian economy is in deep do-do