In a way that already has happened in Russia. The sanctions did not lead to less (or more) support for the war. The initial sanctions were justified as they targeted the russian state, but the knee jerk reaction of also imposing sanctions that explicitly were aimed at the population lead to nothing but resentment against the west.
Whether you are on the morally right side or not, it does not matter in that context; you cant really debate your way into convincing someone that you are doing something for his own good when you are doing everything you can to also make him suffer
If the intention is just to hurt them for the war, then sure that will work as intended... but I think it's dishonest to pretend we are doing it for anything more "noble" than that
If nothing works I prefer to apply punishment in hopes that smart Russians emigrate and Russia will crumble. And yes, punishment should affect more civilised and smarter Russians too to either motivate them to clean up their country or leave it.
It's war, so again no moral judgment on that, but sugar-coating it is even worse than admitting the truth.
A bit off topic but if you think the west was supporting and hugging russia or ukraine in the 1990s and 2000s, you might need to revisit how we got here.
There's just no need to pretend it's for their own good when it's trivially easy to prove that sanctions rarely lead to the end of a dictatorship. Just look at Cuba,Iran,NK or even venezuala.
And trust me, democaracy that we got out of discontent stemming from economic devastation is worth every hardship we endured.