Uh I dunno, maybe because they whine and take things too personally...
Seriously are there any serious examples of ENTJs getting a bad wrap any more than the rest of us? Link/citation etc...? If anyone gets an unfair wrap here its the SJs...but what the hell whats wrong with a little criticism...if it doesn't kill us it helps us improve.
What we need is a good "Tell us what you hate about ENTJs" thread. Both the ENTJs and the NFs will go up in arms seek out equality and start harping about typology prejudice. Therefore redemption via backlash.
Whats wrong with this place is that its too prejudice of prejudice of different MBTI types. Shucks cant make an omelet without breaking a few eggs.
Man up and walk it off.