You are improperly aiming. The point of the triangle should be on the target, and the range to it is determined by turning the range dial. All you’re doing is wasting time and precious ammo. Practice what I said, and you’ll be amazed as to how many hits you’ll get. The L/56, 88mm gun on the tiger I is very accurate when sighted properly. Hope this helps!
Please learn how to use the excellent German tank sights! You waste a lot of ammo the way you shoot. This is a good video except for that; one other thing, you shouldn’t out run your other tanks, as it’s dangerous for a tank to be alone in enemy territory.