especially since during the Peruvian Civil War most of the Chilean/Atlantean aircraft kills were by AA boats.
Oh really?
Oh hai thar. Yeah I take it I got some details wrong didn't I?
Neither the Chilean nor the Atlantean fleets suffered much in the way of air attacks. The only AA action I found in re-reading my notes was when the Chilean battlecruiser
Santiago (launched 1913, refitted 1930) downed two SM.79 bombers making torpedo attacks on her. With 184+ aircraft losses in the war, that's... eh, 1% of all Peruvian losses. It was mostly from a lack of opportunity: the Chilean and Atlantean fleets generally stayed out of aircraft range and therefore never had to prove their AA. One of the other occasions they got an inbound raid, CAP dispersed it before the attackers entered flak range.
However, the old Peruvian battleship
Huascar shot down five aircraft during the Battle of Tortugas, and a carrier raid on Lima met heavy flak, including fire from a 1935 heavy cruiser.
So if "most of the aircraft kills" means "around 1%" and by "AA boats" you mean "modernized Great War battlecruiser", then you're right.