Depicting Americans as the underdogs in April of '45 was a bit of a stretch, but they made it work.
For a Sherman crew, it probably wasn't that much of a stretch. They had gasoline engines and poor ammo storage protection, which were not good. They were designed for ease of production. So, we could make a lot of them. Not only did we have to make them, we had to move them. German and Russian tanks had to only be moved over land. American tanks had to be shipped by water. We also were responsible for tank production for nearly all of our allies to some extent. The Germans had better tanks, but they were hard to make, hard to transport, hard to repair and hard to recover. The Sherman was the right choice, but they WERE the underdogs on any contact with any German tank.
The bazooka was pretty good for knocking a hole in a wall. Not so great against German tanks. Actually, we need something like a bazooka for urban combat today and don't have it. Panzerfaust was dirt cheap and had a good chance of knocking out a Sherman if you could hit it. Since it was so cheap, easy enough to hand them to infantry like candy.
https://medium.com/war-is-boring/david-rae-kept-fury-authentic-59afc67ebf11Apparently, a former British soldier named David Rae was in charge of tank tactics. Aside from practical considerations, the tank tactics were pretty sound that I saw. Overdramatized a bit but it's supposed to be a movie, not a training manual. Overall, quite good. I wasn't aware the movie snagged the world’s last functional Tiger tank.