There hadn't been any hybrid war until Western world gifted those regions.This war showed once again that Putin is master of hybrid warfare but very weak in regular warfare.
Using hybrid warfare he captured THREE major regional centers in Ukraine: Sevastopol, Donetsk and Luhansk with nearly zero losses from Russian side.
Using regular warfare with all his army he failed to capture a SINGLE reginal center of Ukraine in 3+ years sacrificing over 200,000 KIA.
This war showed russia is paper tiger with it's helpless army. Russians can just bully weak minorities and weak nations.
This war showed Russia is a weak country.