Something tells me that Evan isn't so great at his job. I also suspect that Evan isn't a human. In fact, do you think a lot of those chat robots are even human? No, they just throw out a couple of automated responses to get past the easiest of questions that are usually solved quickly just by copy and pasting order numbers and whatnot. If your problem is bigger, they'll send a real human, or maybe just a smarter robot.
The worst thing about these chat services, whether it's a robot or a human, is that you can't properly get mad. Screaming in the phone at least helps you blow off some steam. Jabbing at the keys of the keyboard in anger isn't as stimulating. You could yell at them in all caps, but even that doesn't really do the trick, does it?