This guy.
https://www.youtube.com/watch?v=wPjqieb6R_0
Despite the video title, it's not a Delta pilot. It's hard to make what he's saying, but it basically looks like he isn't getting on the flight.
1:42 "this is frustrating, I've never left you guys behind when you're in the back"
2:15 sounds like hand slamming the desk
3:52 "that's an MD80, right? "No, that's an Airbus." and then more arguing, with her finally saying "I'm just trying to do my job."
If you're arguing 4 minutes with a gate agent about getting on a flight, you already lost. If it's a DH, call scheduling and get them to fix it. If it's nonrev or jumpseating, walk away and take the next flight. What does one hope to accomplish by arguing?