You cannot generalize based on your experience of a single occurence. I read the Russian report on the TU-154 PAF crash, and it was very thorough and factual. In fact, given the very high profile nature of this accident, the Russians would have no interest in making fools of themselves.
Similar was the report on the Yak-42 crash carrying the hockey team. There was a lot of blame in that one, including the Civil Aviation regulators.
I take it that you have no idea about some of the reports from the US NTSB. In quite a few cases, it took a second analysis from ALPA's accident investigation division to make the NTSB reverse some the cop-out conclusions the NTSB had made: namely simply blaming the pilots in question.
Your report of vorex ring state not being a Russian problem may simply have been a language issue.