Why is it a "regime"? Putin was democratically elected and even Western opinion research institutes unequivocally attest that he is supported by 85 to 90 percent of the Russian population.
In US media this is always attributed to "propaganda" while economic successes that might have an influence on Russian votes is completely ignored. For example: Russian GDP rose during Putins years tenfold. Russia reduced its foreign debt down to 23% of GDP and a flat tax of 13% for everyone was introduced. (I live in the EU and I am basically robbed by my government - I pay a hefty 50% tax on top of being forced to charge 20% VAT from my customers)
If these aren't good reasons to vote for someone then I don't know what is. I would vote for ANY party (except radicals), be it left or right that would stimulate GDP growth while reducing my taxes down to 13%.