Can someone explain me that?

Can someone explain me what they mean when saying "statcheck champion" and feast or famine playstyle"?It's very difficult to understand what you mean by saying that, because in a game that revolve around farming and getting your stats higher and becoming stronger in later game, or helping another champion to do that, its very unclear why are people %%%%%ing about certain champions who do that.Isn't that the whole point of that game?And there will be always losing side so the "famine" part is inevitable too?
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