Why does everyone hate IT? Same reason everyone hates customer service, call centers, and law enforcement: You usually don't think about them until something's already gone wrong.
It's why I got out of sysadmin jobs. Management hated me because "Well, if they had done their job right, there shouldn't be problems for them to fix" and everyone else in the company was "Doesn't matter if I don't know what I'm doing, they aren't doing it for me. So I'm always going to save them as my excuse for why I had to miss a deadline: 'My system wasn't working and the IT guys couldn't get it working fast enough'"
I stopped reading it a long time ago, but it's why BOFH was funny.