Since it blasted to pieces every allied piece of crap it met. And with style, from at least 1000 meters. And it was operated by the best crews in war, too. See, allied crews didn't survive enough to gatter the experience of german crews... someone published a table with WW2 tank aces around here. Look at it, and you will understand.
I do not negate that Tiger was a good tank but it seems you forget about few things.
Panther was WW2 masterpiece, not Tiger.
Tiger had 90 angle armor which is design pudding.
Panther was only 10% more expensivethan PzIV while Tiger was too expensive for what it could do.
I would rather say, that Tigers, King Tiger, and stuff like that, led Germans to the loss.
Germans would make better use of few PzIV with long barrels than one Tiger.
They have lost not because of amazing ubser steel allied tanks, but because of shitty tanks in numbers.
And it's not hard to become Ace with Tiger when you are shooting to Shermans.
There was a time when KVs were smashing Pz 1-4 so... But it does not make them best WW2 tanks.
And the crew... I remember battle between USA and Germans (yet dont remember which one) where Germans had used Panthers. Shermans were useless. Could not penetrate them. Germans received order to move back or maybe they ran out of ammo - really, dont remember - so instead of reversing, they turned back and showed Shermans there asses. None Panther survived - that crew