When I first came up against the IS3 and got royally swatted I Googled 'war thunder kill IS3' and read a long post full of people whining about how hard it was to kill it, but they went into the stratosphere when some guy came on and said, "I don't know what all you whiners are complaining about. I have the IS3 and it is NOT impossible to kill, I can tell you. There is a huge shot trap just below the barrel and if you are surrounded by Tigers one of them is sure to hit it. I have to be very careful against groups of Tigers."
I leave to your imagination how many people got warned for swearing at him...