Even after that though, I think they should have prioritized lives over territory. Luring Russia deeper into their territory so that their supply lines could be cut and trying to fight maneuver warfare would have worked better than trying to win a WW1 style war of attrition against an enemy 5x the power and equivalent sophistication that is fighting a war of attrition against you.
Russian logistics were only really seriously threatened by HIMARS and only then for a short period (theyve since deployed counter measures). Ukraine only really has the resources to hit propaganda targets behind enemy lines now - Russian logistics are not being threatened in any meaningful way any more.