Good news: Russia lost a lot of extremely expensive and hard to replace equipment this week.
Ukraine is going for what they can get as cheaply as they can get it. Its working.
Vlad0 posted an article which addresses your point & ultimately is supportive of Ukraine.
“Ukraine’s offensive: is it failing?” https://samf.substack.com/p/ukraines-offensive-is-it-failing
However, he did not post the summation conclusion.
I did in Comment #25: https://freerepublic.com/focus/chat/4178053/posts?page=25#25