Worth noting that American intelligence has been on point about Russia for the past year. They alerted everyone else that the Russian army's "manoeuvres" in February were an actual invasion. Even the Ukrainians didn't believe them initially, but were finally convinced. This was critical in allowing them time to get their defence in order before the Russian tanks started rolling.
So no, it seems like the FSB is doing a poor job compared to the KGB.
> The FSB didn't know about the invasion, because the top brass didn't tell them.
Should have been painfully obvious to anyone in the FSB Ukraine division, given they reportedly surged in size in the months leading up to the war.
>> The files show that the FSB unit responsible for Ukraine surged in size in the months leading up to the war and was counting on support from a vast network of paid agents in Ukraine’s security apparatus. Some complied and sabotaged Ukraine’s defenses, officials said, while others appear to have pocketed their FSB payments but balked at doing the Kremlin’s bidding when the fighting started.
So no, it seems like the FSB is doing a poor job compared to the KGB.