What is it about the oxymoronic "Russian peace deal" you don't understand? Ukrainians are fighting because surrendering their territory means surrendering their people to torture, kidnapping, and genocide. It also means only waiting for Putin's next invasion.
If Ukraine ends up at the end of this war with a worse ‘peace deal’ with Russia than what they could have gotten last year, and with thousands of Ukrainians killed since last year, then a lot of Very Serious People in the West will have a lot of serious questions to answer.