Exactly. With eight years of planning they couldn’t take Kiev. Now with three years of, uh, extensive training, even Talinn looks out of reach

I won't discount the institutional knowledge they are gaining from this long in the fight.

But as you say, the bodies simply aren’t there to implement much

3 battalions of russian boys turn 18 each day...

…every day for three years, yet couldn’t hold, nonetheless retake, Kharkiv