It's not just the person you're responding to--the FTC looks only at relatively pure monopolies for anti-trust violations. There are lots of things that are legal as a player in a competitive market versus illegal as a monopoly. The US has a long history with pure monopolies, which are why the laws are the way they are.

You can argue until you're blue in the face that the FTC should look at other things, as well, but I'm not sure you'll get very far.