The longer this goes on in the current format the longer it shifts in Ukraine's favour. They have the moral, and the numbers to just continually ramp up numbers with ample support from NATO for weapons etc. Their irregular forces are far more motivated and effective than anyone would have guessed. While Russia continues to call it a special military operation they cannot call for mass mobilization of their reserves and their manpower will continue to be more and more outnumbered. They may have some success in the far east in regions where the populace is more supportive of them, but the cost will be very high. Militaries the world over are learning some very interesting lessons from this conflict around reservists, urban combat, and effectiveness of traditional military forces when taking cities that are willing and able to defend themselves.
Ukrainians are tough as nails. I don't think Russia is going to get much out of this conflict and it has cost them a lot. It has shown the world the only thing they really have to fear from Russia is their atomic arsenal. Otherwise they are a paper tiger.