Ignis knew that he would get this reaction from Marshal and he's not surprised. He has a reason to be angry and if Ignis didn't know the circumstances they were in back then, he would've been angry as well.

"We had no other choice," Ignis says, looking more than just unhappy with the fact that he had to accept Ardyn's offer. "The Meteor and Archaean were heavily guarded by the Nifelheim forces. With the base in the mountain, we had no way to infiltrate it." It is completely different from those flying fortresses and bases laid out on the low ground.

"Once the Titan was awake, the Meteor site started collapsing on itself. We had a no way out- we were completely walled off at the bottom of the Meteor where Archaean was sleeping. So we had to accept the offer from him to get us out of there." What's the blessing if the Meteor becomes Noct's tomb?