Neither of these things he describes are surrendering:
It could have given the Donbass some independence referenda and just let them go. It could have actually tried to adhere to the numerous Minsk Agreements to deescalate and prevent war.
In fact both of them would have prevented Russia from annexing donbass. They would be independent territories that would act as a buffer state between the two countries.
I was coming at it from the sense of both outcomes being the same (Ukraine losing Donbas) but in one scenario Ukraine “wins” because it doesn’t get bombed and lose hundreds of thousands of people, but you raise a great point. There was a chance that letting Donbas go in 2014 would have resulted in a fairly neutral buffer with Russia.
There was a point where the DPR and LPR were just seeking autonomy within Ukraine to speak Russian and decide local issues but the hardliners in Kiev decided to sic Nazis on them instead.