Misguided in thinking that a large nation state needs a signals intelligence capability? They aren't the SS.
The NSA has overreached because after 9/11 congress demanded that they start overreaching. The AUMF was sweeping in its breadth.
They will have to be reigned in...but the idea that what they are doing is "evil"... if we aren't going to hold people accountable for torture it doesn't make sense to call privacy invasion "evil".