It's worth noting that the only real criticism you level against Shakespeare here - that "shall I compare thee to a summer's day..." is incoherent - rests on an embarrassing misreading of the sonnet. Far from being a strike against Shakespeare, his point is that summer days are not temperate but hot! Likewise, Autumn is too short, May is too windy, and so on. The subject of the poem, Shakespeare claims, does not suffer any of these flaws. I think this serves as a useful yardstick for the quality of your other claims about Shakespeare.