I just stumbled upon this photo. You can easily notice that most European countries are doing relatively well, except for most Balkan countries, except Greece. Unfortunately, Russia, founder of the Sputnik vaccine, isn't doing so well.
Russian users have already explained this. There is a lot of hesitancy in Russia against the vaccine and they are probably the only country where there is an oversupply of the COVID vaccine. If I am not wrong, less than 20% have received at least one dose of the vaccine in Russia. On the other hand, countries like Argentina mostly rely on vaccines imported from Russia, and they have managed to achieve a vaccination rate of close to 50%. And the rates haven't improved in Russia, despite the recent spike in infections/deaths.
one of the barriers to vaccination is the amount of fake news circulating in the community. there is a lot of fake news deliberately created by irresponsible people so that people are afraid to receive vaccines. maybe this is what is happening in Russia right now, and of course it is also happening in many other countries.