The Russians are failing and that’s a simple fact. Major defeats at Kyiv, Kherson, and Kharkiv. Is Bakhmut next?
I think that's a good possibility. As you've pointed out, Russia has yet to hold a major city.
I think part of the reason Prigozhin is lashing out so much is because he sees the writing on the wall. And if the division between him and Moscow worsens, it's possible Wagner may pull out altogether.
It won't happen (wishful speculation on my part), but I'd laugh my ass off if Prigozhin decides he's had enough -- and fears for his own safety -- and joins Ukraine. In the end, Wagner fights for money, not a country.
The Spring Offensive at last! Push all the evil Ruzzians back to the Border! Take back Balkmut and show them what Ukrainians can do! With the new German super tanks (unstoppable steel monsters) and new Americans rockets—and soon planes—The Ukrainian valor can do in the face of the world’s worst army. They will be in full retreat by June! The war will end in a brilliant Victory for President Zelensky and Biden. Ruzzia is done! The Victory March is on now. Buy, hard fighting is ahead and more Billions needed—more rockets, planes, tanks, and pick-up truck “tacticals” before the August Victory parade. Then we in the west can transform Russia like Obama did America! Victory for Zelensky!