Also consider that sanctions as a result of the Crimea annexation haven't done anything. We're still here, today, 8 years later, and Putin is waging war again. The funny thing is that when I was looking for something about this, I found an article[0] that is generally positive about the effects of sanctions on Russia post-Crimea. Which I find kinda hilarious, because I think it really proves the point here that these sanctions don't actually work. The Russian economy slowed quite a bit, but it seems clear Putin and the oligarchs don't care all that much; the harm from those sanctions were disproportionately borne by regular Russian citizens, who were powerless to change the country's foreign policy. And, regardless, Russia is still in control of Crimea, and has not deterred Putin from this current war, so... that's a pretty big hint the sanctions did not do what they were supposed to.
[0] https://www.nato.int/docu/review/articles/2015/07/13/sanctio...