In terms of evaluating roughly how powerful fictional entities are, actually it is a valid argument. There is no absolute standard that defines their power level, and the closest is general perception. Gross outliers to that general perception, like yours, is indicative of your being wrong.
No it is not. We go by what's on panel, not what most people think.
You think everything from a DC character you don't like is an outlier. You're not a good judge for anything marvel related.