Look at Putin - doesn't matter what he does, his retinue does what they want. They are enjoying super-yachts, parking them without any issues in European ports, their kids are still “almost gods” and do whatever they want.
The western world gratefully takes the money from dictatorship regimes, and they don't give a shit where money comes from.
While it happens, dictators will not stop. As soon as dictators lose their establishment support, they’ll be overthrown.
All of the “sanctions” are so ridiculous, that it looks like these sanctions were made to calm down the own citizens, not to stop this devastating money flow.
You're not going to get a lot of people on your side suggesting we do to Belarus what we did to Japan.