He does in fact have the ability to commit national and cultural suicide. Would that result in the destruction of the world? No one really knows because no one knows the actual status of the Russian arsenal. Obviously, some of it will work as designed and reach their targets. That would indeed be a catastrophe. However, essentially all of ours will work, reach their targets with unerring accuracy, and Putin knows it.
Negotiations break down for all sorts of reasons. I would simply suggest accessing as broad a set of assessments of those talks as possible. The notion that it was anyone's fault - American, British, Russian, or Ukrainian is just simplistically wrong. Negotiations are particularly difficult when the conditions on the ground are changing rapidly advantaging one side and then the other. Putin's claim that the agreement was there to be reached is as specious as claims the CIA, State, the UK, Zelensky, or some mysterious force stalled them. Dozens of influences were at work in a volatile military environment.
The attached article in Foreign affairs is the most thorough I know of that has studied that series of meetings in Belarus and Turkey. I do not necessarily agree with all of the authors' assumptions, but the review is the most thorough I have found. Pick your villain, or realize sometimes there really isn't one. This is a brief summary of their conclusions.
"A final agreement proved elusive, however, for a number of reasons. Kyiv’s Western partners were reluctant to be drawn into a negotiation with Russia, particularly one that would have created new commitments for them to ensure Ukraine’s security. The public mood in Ukraine hardened with the discovery of Russian atrocities at Irpin and Bucha. And with the failure of Russia’s encirclement of Kyiv, President Volodymyr Zelensky became more confident that, with sufficient Western support, he could win the war on the battlefield. Finally, although the parties’ attempt to resolve long-standing disputes over the security architecture offered the prospect of a lasting resolution to the war and enduring regional stability, they aimed too high, too soon. They tried to deliver an overarching settlement even as a basic cease-fire proved out of reach."
A hidden history of diplomacy that came up short—but holds lessons for future negotiations.
www.foreignaffairs.com