First of all, just about every company that "left" Russia, merely "temporarily suspended" their operations, by their own admission. Most still keep paying their employees, keep their stock, etc. Many McDs are still open. There is no sugar shortage as Russia produces more than enough sugar, there was a brief artificial shortage because someone said that sugar will run out and some people are stupid. Overall the country isn't as fucked and as isolated as the media wants people to believe. Not even close.

Second, the only thing that the sanctions lead to is uniting the people and hatred toward the "west". Russians haven't been subjected to a multitude of "divide and conquer" information campaigns (unlike the US), and turning against other Russians isn't on anyone's mind, for the most part.