someone posted awhile back about the amount of 5" 20mm 37mm 20cal etc fired on navy ships to the amount of aircraft destroyed. It was a lot of rounds (30,000 rounds of 20mm per plane) and few kills.
After WW2, the USN took the numbers of all the 5" AA rounds fired and statistically averaged out that it took 1,000 rounds per plane kill. Not that it actually took 1,000 rounds to kill a plane, but that was the statistical average. Again, this in no way validates or confirms the OP's original whine..err wish that ack of any kind in AH is too powerful.
The only real issue with the any of the acks is how the puffy acks track the target in regards to being able to track and fire at planes that flying are flying on the other side of a mountain that is between the plane and the fleet. There is nothing wrong with the lethality levels of any of the AAA guns and those that claim there is are the ones that are using piss poor tactics and are paying the price. Basically, these whines..err wishes to tone down the lethality of the AAA guns are from those that want to vulch or fly through enemy acks umolested.
ack-ack