My main reason for being against the current Russian regime is that the common people live a harsh life; not only that, small businessmen, self-employed, these are the kinds of people that are ending up being tossed in jail, per say, not paying a tax, license fee or something of that nature. And yes, many are in jail on trumped up charges, perhaps a bit like what is going on in Turkey.
Not sure if it is worse than Stalin's though.