Id just like to say:
WHo gives a fuck what key something is in OR how difficult a melody is to sing. It doesn't mean there is NO melody if it isn't difficult, nor does something that is more difficult make it more valid as an outlet of musical expression.
Long and the short of it, this is a U2 forum. We welcome opinions that differ, but moaning and instigatory behaviour isn't welcomed.
We get you don't like it, and you have outlined some valid resons. What isn't valid is claiming that songs 'have no melody'. Or Bono 'can't sing because the melody isn't "difficult"' or any of this other nonsense that is pure speculation and opinion that you purport to be fact.
I'll give you a fact: Perpetuating a moronic and pointless arguement on subjective matter when it is yourself against about 20 people is one of the saddest wastes of time I can think of. I would stop trying to convince people that your subjective interpretation of music is superior to others before you give yourself an ulcer.