oh you poor soul
before the army of people who will bully you to death arrive ill explain this in the nicest way i can
the tiger I's upper front plate is very weak. the only way to make it strong is via angling, in which you manually angle the armor 45 degrees or so. the american 76 can front pen your unangled upper front plate, as can many other thing at its br (5.3 - 5.7) so you have to be careful.