There should be no hard feelings about asymmetries in the conduct of the debate. That was the setup going in. Any realistic assessment of debates and political coverage has simply got to accept that the thumb is on the scale, and either the margin of victory in every engagement must be so big as to be unmistakable or else the advantage of the administration must be taken into account from the beginning.
You can't fight authoritarianism on the premise that they will play "fair". Fair is not in the rulebook. That's just the way it is.