Thats what a sherman was late war.
When it was introduced, it was a +1 tank.
Even those long barreled panzer IV's had problems with them.
Plus its gun could rip trough any german tank at that time. And the tiger tank, it was not very common. The US Department guessed that not much of them would be build. And they where right. Untill 1943 the Sherman was a good tank.
Untill the panther tank came to the fields. The US department thought that it would be "another complicated heavy tank".
They where deeply wrong. Sure the Sherman could one shot kill a panther from the sides (unlike FH2, the panther had most of its ammo stored in those areas) But if you count that on D-day, of the Tanks itself (StuGs not included) that their where 40% panzer IV's, 10% tigers, 10% Panzer III... and 40% Panthers....
That 120MM frontal armor with the KWK43 7.5CM gun simply ate shermans.
You can guess now the high losses of Sherman tanks.... High silouette. The 91MM frontal turret armor was pretty good, but the 60MM frontal armor, wich make up the far majority of the target......
Shermans wherent upgraded much aswel.
Take the T-34 for instance. At the start, it had 60MM sloped armor, but a 1944 T-34 model already had 100MM frontal armor and an 85MM gun.
By D-day, only 3000 shermans armed with the 76MM gun where built, while 11000 T-34/85 where already ready by that date.
Sherman tanks are good. The best tanks, imo, still against AT guns, statics, infantery and Flag assault support, but when you encounter german armor, especialy Panthers, simply= Run. And if you can, Grab a cromwell, or a 76MM sherman, or its variants. Hell, if i had to choose between a greyhound and a Sherman, my choise would be made quickly
Thats what many allied tankers did anyway. They knew their 75MM guns where completly useless against the frontal armor, and they simply Avoided german armor.