Myth 1: They were known as impervious because no Allied tank had the time to get within a range to penetrate their armor and the 75mm had no chance of pen from the front. The 76 and the 17pdrs could NOT penetrate the front of a Tiger II, maybe the lower glacial but not the upper hull which was sloped at 40 degrees with 100mm of armor which turned to around 180-190mm of frontal hull armor. Now sides were easy and the back was even easier, but actually getting within range was the problem.
Yes, I completely agree with your statement on Soviet guns, as they were higher powered than the other Allies' guns.
Myth 2: Kill ratio does not mean anything when what you're driving can't be taken out. Allied crews were, on average, better trained than German crews, past maybe 1943 as the amount of qualified crew started to run out as Germany began to lose the war.
Myth 3: The T26 Super Pershing (Prototype version, not the regular M26) penetrated the front of Tiger II in a short brawl. But of course, this was nearing the war's end.
Myth 4: The German Maus was built and used, actually. It was used in defensive of the factory it was being built at. The remnants of the two Maus tanks are combined into one at a museum in Europe (I'm not sure wear, cba to look it up).
Myth 5: This is true, but still, the German guns had the range to do it.
Myth 6: I don't know where you heard it was flawless, because the person who came up with that should leave the historical community.
Myth 7: The SS WERE elite divisions before they met the Russians.
Myth 8: The Germans used whatever they could get their hands on late in the war. The French B1 was a particular deadly opponent, when used by the right crew. Its armor was thicker than the German's.
Just my two cents