There is no doubt whatsoever that it is the room. Tile floors and large glass windows is tough to work with. Curtains over windows will help along with an large area rug over the tile and lots of furniture, lamps, plants, etc. Anything to break up the sound. Since you talked about wife acceptance factor I doubt wall treatments and bass traps would be acceptable. Move to a smaller carpeted room
Speakers or room
I have a very lively room. Tile floors, large window and open area. If you clap there is a loud echo. Furniture is limited. I set up Kef LS50w and the sound is recessed not forward. The room is 26 x13 and even up close it doesn't sound good. Is it the room? What should I do ? Wife acceptance factor comes into play.