That is an insane exaggeration and I'm not even interested in the "no it's not" retort. If you really think they clear out garrisons that easily, please post replays.
At the northern VP in ettelbruck station there are 3 medium-sized apartments, I had a garrisoned 6 man maxim team brought down to 1 man with maybe 5% hp left, and he died right after the barrage to small arms fire from one volks squad.
10 munitions was too little even before the munition revamp of OKW. It might as well not even have a cost to it now.
Just another example of widespread bias on this board. If an allied commander was throwing hand-held carpet bombs, people would be up in arms. So far the only allied units that haven't been dubbed "overperforming" (annoying buzzword you people keep using) are dogshit units like conscripts, M-20 and the SU-76.