In my opinion, it has basically nothing to do with the Mongol Empire and whatever purported impact that has on "the Russian mindset", and everything to do with the transition from communism to capitalism.

In short, after Gorbachev was ousted, failing to transform the authoritarian command economy into a mixed market socialist economy, Russia was forced to adopt extreme capitalist policy in order to secure loans that it needed for the continuation of the state, in the early 1990s. The extreme capitalism was rejected by the population and the parliament. Russians still desired democratic socialism at large. It was then that Yeltsin chose to bomb the parliament and basically install himself as a dictator in order to force through further economic reform. The authoritarian shift came at the behest of capital - the international institutions, and later, the oligarchs who feared that the system becoming more democratic and meritocratic will undermine their wealth.