Negotiations don’t exist for Russia, they are known for breaking all agreements anyways. Russia is not trustworthy in the slightest, they have never missed to prove that. You don’t push the trigger on a loaded gun and hope for it to not fire. If you believe otherwise you desperately need to get out of you bubble and drink less Vodka.
Russian people killing Putin is the only way to end this sooner.
A safety buffer zone of a few kilometers, on the Russian side, past the Ukrainian country, sounds reasonable. Depending on how far they still keep shooting.