Yeah, and 80% after almost three years isn't the sort of pressure needed to make Ukraine come to the negotiating table. The rate of Russian advance isn't fast enough, and their gains aren't big enough to put the squeeze on Kiev to negotiate. That's why it matters that the front hasn't collapsed. Unless the front collapses, Kiev is unlikely to negotiate.
It's currently similar to the position that Germany was in in 1917. It was losing, but it still had a lot of land, and a lot of troops. Germany could have kept fighting, but Kaiser Wilhelm II gave a shit, so he agreed to the peace terms.
Finally, those goals are the only sensible goals. If Ukraine still exists after the war, what will prevent it from remilitarizing, joining NATO, and just going to war again? And why would Russia trust Ukraine to adhere to any sort of peace agreement after Minsk II?