Why is it OK to be Assassinated by ADC but not Assassin?

Giving this Rat {{champion:29}} Assassin mechanics, long stealth duration, AOE + true damage + Range is ok. Let's not forget the fact that he's been on 55%+ win ratio, 16% pick ratio and 65%+ ban ratio for several patches. But whenever an Assassin gets the same Ratios, nerfed next patch. Then they give you the following BS on their career site [[We’re looking for humble but ambitious,_** razor-sharp professionals**_ who can teach us a thing or two]].
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