Like I said, none of these takes are really outside of the mainstream. Here's a piece from NPR on it. Under the tags takes you through Yeltsin's re-election with oligarch support and finally the emergence of Putin.
Look I understand that there is an element of monday morning QB'ing involved here, as with all this stuff. But we have to be willing to learn from our mistakes. We can't even get to that point though if we cannot acknowledge that there were mistakes and ramifications that we have to work through today. This isn't just related to post-cold war policy in general and russian in particular, it generally applies to every single continent on this earth. For example, check in on dailies coming out of Syria.
How 'shock therapy' created Russian oligarchs and paved the path for Putin
https://www.npr.org/sections/money/2022/03/22/1087654279/how-shock-therapy-created-russian-oligarchs-and-paved-the-path-for-putin
The Rise Of The Oligarchy
The Russian oligarchy arose out of the mayhem of rapid privatization in the 1990s. After the fall of the Soviet Union in 1991, Russian president Boris Yeltsin, a leader in the revolt against communism, had to figure out how to transition from a command-and-control economy to a market one. Yeltsin turned to the Russian economists Yegor Gaidar and Anatoly Chubais, who, with the aid of Western advisers, hammered out the details.