Is Russia the worst human rights abuser? The short answer is no. However, Russia is one of the worst, and it's only been getting worse over the years, particularly since Putin returned to power in 2012. As Mr. Genser mentioned, I used to run Freedom House. It produces this category of “the worst of the worst”, and Russia is not in that category. Countries like Uzbekistan, Turkmenistan, North Korea, Syria, and Saudi Arabia are among the worst of the worst.
Your question leads me to say that this is why I support the global Magnitsky act, which has not yet been passed. It would put the spotlight on other countries that are engaged in the greatest human rights abuses. My view is that Russia may not be the worst, but you sort of have to go after opportunities when they present themselves.