Obviously, I don't know what the Ukrainians really said during the talks, but the way TASS presents their arguments it should be pretty clear that Russia cannot accept any longterm peace, though this presupposes that psychopathic Kremlin takes geopolitics and Realpolitik seriously instead of being spineless gangsters who compromise when the going gets tough.

Geopolitically it's no doubt that Russia can never accept this Ukrainian offer as TASS presents it:

Outcome of Istanbul talks: Ukrainian proposals, Russian de-escalation steps

"Alexander Chaly, a member of the Kiev delegation, said that Ukraine agreed to adopt a neutral and non-nuclear status if it were given security guarantees, which "in content and form should be similar to Article 5" of the North Atlantic Treaty. According to him, the guarantees should envisage military assistance and the establishment of a no-fly area after three days of consultations in order to pursue a diplomatic solution."

"The guarantors, according to Kiev, could include permanent members of the UN Security Council (including Russia), as well as Germany, Israel, Italy, Canada, Poland and Turkey. Their guarantees wouldn't cover Crimea and Donbass, according to the head of the parliamentary faction of Ukraine's ruling Servant of the People party, David Arakhamiya, who is taking part in the talks."

"Kiev also demands that the guarantor countries help Ukraine join the European Union "as soon as possible"."

Kremlin has been demonically heroic so far. I therefore assume that they will continue to secure that Ukraine is a truly neutral buffer zone. Zelensky is engaging in non-binary woke-speak (Orwellian newspeak) when saying that "neutrality" is to be in an alliance of guarantors. No adherent of political realism will accept that.

Unprecedented sanctions against Russia have maybe surprised Kremlin. Surprised or not, it will take time for Kremlin to adjust to the new realities of Cold War 2. What really matters is winning CW2.

If I had been on the red team in a war game I would have subjected Big Tech in Holland, Ireland and the US coasts to a few super-EMP attacks.

But the conflict between AI robot Washington and heavily sanctioned Kremlin today is like a mafia war between a sleazy McMafia and the "honorable" rural Sicilian mafia in the 1920s. These high-functioning gangsters are not like Hitler. Even the Kremlin is pragmatic to a certain degree. Putin is not hundred percent in the Romanticist tradition. His relatively lukewarm bureaucrats are really not that into the idea of risking everything and potentially die in a magnificent Götterdämmerung. They must be forced (tricked) by perceived necessity to accept an escalation involving EMPs. They will try to avoid it, like a person avoids doing a root canal without anesthesia. It's something you want to postpone as long as possible.

Kremlin knows however that the playbook they used during the first Cold War led to failure, to put it mildly. They know that the US woke/libertine AI robot panopticon will rule the world in 2035 and 2045. Proxy wars in Ukraine or elsewhere is not going to solve anything. Proxy wars did not work for Kremlin between 1945 and 1992. They will not work in Cold War 2 either.

Winning the Ukraine War is a "cherry on top", but not crucial in the 2030s or 2040s when new tech will neutralize the importance of geography. I therefore guess Kremlin will have Ukraine as their primary "side project" while domestically prepping for hitting the EMP button if they ever have the will power to win Cold War 2. Pressure from NATO will help a lot, but if things calm down in Europe it's possible that human inertia and regression toward the mean will get Russia slowly warmed and boiled as a frog in the pot of woke Uncle Sam.