Baffled that a heavy tank bounces shots. No.
Baffled that such a high percentage bounce from paks, stugs and panther compared to how often tigers and Panthers get penetrated by allied at, absolutely.
Axis armour should not be Op but given that allied infantry is stronger than Ost then it is not unreasonable that axis tanks should have better penetration amd accuracy than what is currently in ppace.
Have you ever shot at jagdtiger frontally?
Literally nothing penetrates it.
The oh so OP allied TDs have less then 50% to pen it from max range and only bit over 50% at point blank.
Also, IS-2 is not even close to meta unit with its current state, it also happens to be the ONLY allied unit with 300+ armor and its not like axis doesn't have at least 2 units with much more armor then that AND these units also happen to penetrate IS-2 with up to 100% chance at any range.
Stop pretending the grass is greener on the other side and if you really insist on it, jump the fence and find out yourself.