Your opinion seems contrary to what most political analysts suggest. Where are you drawing your conclusion from?
EDIT -- No seriously what are your sources for that ratio? The largest claim for Russian loss was by a member of NATO, citing the 3 to 1 issue for a defender, and going off Ukraine's losses of 7,000 to 15,000 troops to equate to roughly 30,000 and 40,000 troops. I believe this was sometime last week. Ukraine claims to have killed less than 20,000 troops. That would fit roughly well with Ukraine's lower end estimate of 20,000 troops. The only way you could get 5 to 1 is if you took the higher end of an estimated Russian loss of 40,000 and assumed that the UAF had only suffered 7,000 in losses, which goes against the entire rationality of the estimation. The Russian leak/claimed hack itself, possibly the most accurate numbers for Russian losses last week, only claimed 10,000 losses.
And although that was last week, with Russians suffering heavy reversals this week, that's probably a far more accurate number. 10,000 losses to Ukraine's 7,000 to 15,000 losses is probably what you'd expect from an attacker with superior firepower, air power, and mobility. Assuming the rate of Russian losses is the same as it has been for the past month, the Russians are probably hovering at around 12,500 in losses. Possibly more because of the recent reversals.