The Worst Thing Oscar Martinez Ever Did On The Office
Many of the characters on "The Office" were too wacky for their own good. Michael Scott (Steve Carell) went to great lengths to get people to like him, often resulting in the opposite trajectory. Dwight (Rainn Wilson) goes to extreme lengths to advance his way through Dunder Mifflin, which, again, often tends to backfire on him. And the rest of the Dunder Mifflin crew all have their various eccentricities.
If you had to assign one person of the bunch who's arguably the most "normal," it would probably be Oscar (Oscar Nunez). He clearly has a firm head on his shoulders, and he tends to think the most logically out of anyone in this particular workplace.
He's smart, clever, and compassionate. That's not to say he doesn't have some humorous moments, as his intelligence is often a foil to some of his dumber coworkers. But even someone as smart as Oscar isn't absent from making mistakes. And over the course of "The Office," he made a doozy that may make you question everything you think you know about the character.
Oscar insulted Pam at her art show
Sometimes, Oscar can be a bit too pretentious for his own good.
During Season 3, when Pam (Jenna Fischer) has her art show, Oscar is the only one to go besides Michael. One might see that and assume he has a good heart, which he probably does. But he goes to the show with his boyfriend, Gil (Tom W. Chick), and the two proceed to tear her artwork apart. Gil compares her paintings to "motel art," which is clearly meant as an insult. Meanwhile, Oscar says that courage and honesty aren't her strong points, which may even be more hurtful than what Gil said.
Gil merely insulted her art, but Oscar insulted who Pam is as a person. After all, it certainly took plenty of courage for her to put on this art show and open herself up to such criticisms by the general public. Besides, Oscar should've known better than to speak ill of Pam when he knew she would be meandering about the building. He had no idea she was right behind him when he said that, but he should've erred on the side of caution and stood up for his friend to Gil, no matter what he really thought about the art.