Having recently just finished an excellent biography of Stalin, Biden is a weak link who would have executed by Stalin and Lenin. The absolute Brutality of Stalin cannot easily be explained but he was beyond cruel and enslaved his own countrymen to expand Russian Industry. The toll in Human lIfe and Misery cannot be calculated.
Biden is not a nice guy, but no.
Try to maintain perspective.
What's the title? Stephen Kotkin has published two volumes of a multi-volume biography, which has gotten rave reviews, as has Martin Sebag Montefiore's In the Court of the Red Tsar.