Zelensky is a bit like a CEO presenting his company's prospects. He was talking like this two years ago, too.
I personally think he's not wrong. Just - until Kremlin gang's members and their families are being caught and jailed\deported all over the globe, or at least in NATO countries, this is all bullshit. Well, maybe after failing in Ukraine they'll attack some smaller and weaker country, just to show themselves they can defeat someone. And maybe they'll try again.
In any case - yes, that leadership keeps Russia weak, inefficient, dependent, but as everyone can see, it's also capable of destruction on scale too big to allow. So maybe some optimism should be applied and the goal be for Russia's regime to change and for it to have a democracy that may make its potential useful for everyone around. The "keeping it weak" approach, after all, has already led to Putin.