Due to the synchronized firing of all 4 guns, there is no density of fire to shoot down aircraft; planes fly freely through the gaps between shots
I suggest giving him asynchronous shooting, like Skink, Wirbelwind
Along with its zero survivability and small ammunition load, it appears weaker than its competitors in terms of eliminating air targets
Its only strength lies in its high-penetration shells
After trying the Ostwind 2, I realized that the Zerstorer was simply unnecessary in my setup. The paper tank won. The Ostwind 2 also has asynchronous shooting