Every nation should kick Russians out, block their accounts,
The Russian people are not making these decisions. Moreover, those who have left Russia are probably among the least likely to support Russia anyway.
What good comes from attacking the people of a country because you disagree with the leadership of the country? This is the same disgusting rhetoric used in the USA after 9/11 where there were widespread calls to kick out ALL Muslims and people from the middle east.
This doesn't follow. First of all, no change happens internally in the USA despite its own citizens complaining of material conditions; so to say that people being unhappy and protesting necessarily leads to change is false. Second, every other sentence people say about Russia is calling it "authoritarian", "dictatorship", etc: you can't simultaneously pretend its an authoritarian dictatorship and also that the people protesting have any say in its trajectory.
Which is just wrong. You're making the everyday civilian uncomfortable. You aren't doing anything against those who actually make decisions. Instead you're punishing someone for their nationality, or where they were born or choose to live. It's punishment for something they didn't do and it's not constructive.
Sure, I understand that you're saying Russia isn't going to just cooperate with requests. But it's also not going to be any more likely to cooperate because you've made the lives of their citizens, or people of Russian ethnicity living on foreign soil, any harder.
In the end this just punishes innocent people and does nothing to achieve the stated goal.