Earlier quoted context omitted.
> security guarantees for Ukraine This is laughable. Russia cannot give any credible security guarantee to a country that it has just invaded! The war has shown precisely that Russia still believes that it has the right to control Ukraine and that any negotiated peace is nothing more than a temporary pause in hostilities in anticipation of a more opportune moment for Russia. Putin is a cypher and no-one really knows…
>> Russia cannot give any credible security guarantee to a country that it has just invaded! Security guarantees would be provided by Western countries, not only Russia.
Russia's key conditions for the supposed "deal" that you refer to were that (i) the size of the Ukrainian army would be heavily constrained and that (ii) Russia would have a veto on any response to future aggression against Ukraine. Ukraine rejected the deal because it would have been worthless.