The Russian economy is worse off

What metric are you using to determine this?

the war will end with Russia getting at most Crimea

This would require the complete and total collapse of Russia and the formation of a new country. Crimea, Donetsk and Luhansk are legally Russia under Russian law. There is no mechanism via which they can be ceded. When everyone eventually sits down at the table they legally can not be put on it by the negotiators that form the Russian side.

I personally think Russia will take everything south of the Dnipro river then hand over the parts that are not Donbass as a political means of showing that the west won against them in some way.

Even if there were a mechanism by which these could be tabled I don't see why they would. They are winning, the counteroffensive is achieving absolutely zero, support is very low across Europe and there is very little evidence that their gains will stop.

What mechanism are you thinking of here? Serious question. How? The only way what you're claiming will happen could possibly occur is via a massive pushback, but that's clearly not happening. You'd need nato to deploy and to kick off ww3 properly.

a coup in the US is completely unrealistic as of now.

I know. But the factionalism and divisions make it more likely than in Russia at the present moment in time. That was the point, to highlight that is incredibly unrealistic to expect it to happen in Russia after we've just had a demonstration of failure with almost no division barring the tantrum that occurred.