Terms seem rather agreeable and a far sight better than any peace deal that would be signed today.
Why the fuck did they not sign this? It properly codifies security guarantees from the UNSC, only properly relinquishes Crimea, leaves the LNR/DNR up to diplomacy, and makes Russian an official language along with Ukraine (which captures the fact that some 34% of Ukrainians speak Russian).
Hundreds of thousands dead and wounded, millions fled from the country, Crimea still lost, Bakhmut lost, Avdiivka lost, and for what? To "prevent another war" despite more comprehensive security guarantees from the UNSC? To "bleed the Russians dry" despite being outproduced by the sheer industrial output of Soviet-era machinery in Russia? To "stand up for sovereignty" despite clearer and clearer signs of covert US intervention during and following Euromaidan?
The terms that restrict the size of the Ukrainian military, bar Ukraine from receiving foreign assistance to rebuild its military, forbid it from seeking security guarantees from any country or bloc, ... The terms that would have made it trivial for Russia to further invade at any point in the future?