How exactly does it hurt the Russian government's ability to do anything?
And as for food, Russia is already a net exporter.
And as for food, Russia is already a net exporter.
The reason why there isn't one is because whatever sanctions you can come up with, they cannot make life harder than said authoritarian regime for people inside the country if they tried to "stand up". You might be eating less because of sanctions, but standing up means you'll be eating even less in prison - assuming you live to see it.
Note that the 1905 revolution in particular happened because of a lost war. So it reiterates my main point: the goal should be to defeat Russia militarily in Ukraine, because that's the only thing that will save the latter.