I don't think it's very puzzling that a large, profitable institution can get dragged through the mud. There's a very simple reason: Many people don't accept that "being profitable" and "being worthy of admiration" are the same thing, or that Goldman's success as a business proves that they're a socially positive force.

The Mafia was a successful, profitable large institution for a long time. People still thought they were crooks, because, well, they were.

You can argue that Goldman Sachs is not comprised of a bunch of lying con men who made all of their money by cheating it from gullible rich old ladies. But "look how much money they made!" isn't a convincing reason in that argument. Maybe they're just very good at lying, cheating, and bribing their way to wealth! The people at the top of the pyramid scheme actually do make money, after all; it's everyone at the bottom who loses out.