https://threadreaderapp.com/thread/1...780199937.html
Uncredited source so take with big pinches of salt, and even if valid it's just just opinion of one FSB analys, but an extremely interesting read touching on a lot topics, so I would still highly recommend reading it.
Basicly "confirming" many previously speculated things, including that the FSB and the military were kept largely in the dark until the attack actually started, meaning real preparations were not made and the Russian forces in Ukraine might be on the verge of collapse due to severe logistics issues.
Also "confirmation" that the Russian leadership was largely working on BS intelligence, provided by analysts who thought they were expected to deliver info telling everything would be hypothetically fine, all hail mother Russia, instead of proper detailed analysis.