What are subtle red flags at a job interview that say "working here would suck"?

I interviewed at a place fresh out of college a while back. Green, hungry for any salary, in a button up and slacks two sizes too big. The phone interview went great so I got called in for an in person one. I show up, nail that interview and the lady brings another person in and we keep the interviewing going. They say "hold on" and bring another person into the room to chat. It eventually turned into a brainstorming sesh of how I could help establish a marketing program that would propel their growth. They absolutely love it all and tell me that we'll all go to the board room upstairs and get their CEO.

We're laughing and getting to know eachother for about ten minutes in there and boom, door swings open. I assume it's Mr. CEO. He gives me one look and then looks to his HR person and says "resume?". As she hands him my portfolio I see everyone's faces go cold. Like they know he's in a mood or something. The guy is flipping through my portfolio so insanely fast that there's no way he comprehended any of it. I get a few words in to explain some of my work but he keeps cutting me off. Eventually he lets me show him a website I recently put together. He gives it five seconds before saying, "I don't like any of these colors". Without any expression he says "Thanks for stopping in" and walks out. The folks in the room are silent and seem upset. I'm bewildered by what just happened. With a sad attitude they escort me back to the lobby.

I'm so fucking happy that asshole didn't like the colors on that website.

/r/AskReddit Thread