The German Army outgunned by the US Army? The Germans had the best tanks, not to mention their 88 mm howitzers, hands down the best gun of WW2.
They weren’t much good in the mud and snow.
In quantity of arms, not quality. By the US, Britain and USSR. As for quality, they were better in some areas, we were in others. We had a better (semi-auto) rifle, they had a squad level machine gun, but nothing comparable to our 50 cal. They had better tanks, but no strategic bombers. Pretty even.
BTW, the 88 wasn’t a howitzer, it was originally an anti-aircraft gun later used as an anti-tank gun. It featured a long barrel for high velocity direct fire. Howitzers are designed for indirect fire—medium velocity shells at high elevations.