Tom Buchanan is a rich, upper-class alpha male who loves nothing more than to bully, dominate, and control those around him. And George Wilson experiences this firsthand. To Tom, George is just a poor sap, one of life's losers. Tom simply cannot respect George. He's an unsuccessful businessman operating a run-down garage in the Valley of Ashes; not only that, but he's also a cuckold whose wife cheats on him with Tom. Tom insults George because he feels entitled to. His wealth and high social status have given him a sense of superiority over anyone outside his class or income bracket. People like George are just there to be used and then casually discarded when they no longer serve any purpose. And Tom does indeed use George, seeing in him an opportunity to destroy Gatsby, someone else who doesn't fit into his elite, old money world.