> Have we already forgotten what happened to Maduro? What other country in the history of the world could pull something like that off?
Venezuela was a raid, not a full on war. And it was so lopsided it was like putting Michael Jordan against a 10-year-old and based on that performance determining that Jordan is the GOAT. It demonstrated that against a remarkably unprepared and unready opponent the US can do well, which tells you nothing about the US's capabilities in actual warfare against a peer, near peer, or just damned determined opponents.
> Russia tried at Hostomel, didn't go so well.
That was not a comparable action to the Maduro raid. The raid was an in-and-out operation, with no need to control any territory for a significant period. Hostomel was a battle over control of territory.
Venezuela was also a palace coup. They didn't raid, they came to collect.
That as well, what resistance was present was reduced from what it could have been (not everyone was in on it).
As a note, while there was no war Russia has already acquired Crimea a few years before and it was only a matter of time before invasion itself was to happen, so Ukraine was preparing for that attack more or less.