I found the anime pretty fun to watch for both the fan service and antics. However, from a story perspective the premise of all the countries abandoning conventional military in favor of just dueling with Objects ends up feeling extremely contrived by the author. Who tries to frame each faction's actions in a logical manner but ends of doing the exact opposite right out the gate. The whole plot of the story centers around how the MC's break the conventional belief that that "Only Objects can destroy Objects" but the sheer obviousness of their actions makes the viewer wonder what everybody else is doing. The 2 maincharacters don't do anything particularly clever, their plans mostly boil down to just running up to the enemy heavy object and sabotaging it somehow for the female lead to finish off.