They kept upgrading our guns (on our tanks), started with 75mms, upgraded to more powerful 76mm, and near the end of the war had a few 90mm, but they were still no match for the German 88s, which had a tapered shell and a larger powder base. They could reach further, and penetrate more. Our guys generally had to hit them broadside (the armor was thinner), hit them in the tread and run, or call in artillery or air support.
Our tanks were lighter and faster, but that came at a price. Our tanks ran on gas, theirs on diesel. When out tanks got hit, the gas and munitions often did not let you escape. My Dad said there would often be nothing left of the guys except a pile of white dust and some jewelry.
As a Radio Operator, they assigned my Dad a 30 carbine, which was near useless in the open farm country where they were. I asked him what he was able to do with a 30 carbine, and he told me "first thing I did was trade it for an M-1, with someone who did not need his any more".