I agree with everything the other commenter said (microbiologist?) to move everything closer together. Your harmony is off and everything is spaced way too far out. Move tour couch away from the wall closer to the tv.

You at least want the front legs of your couch and your tv stand to be on the rug. Add a console table behind your couch with some plants or a bookshelf on the back wall-with some plants. I just feel plants will liven up the room, even artificial ones.

I think something like this would match your couch legs-maybe a grouping of 2-3 of them?