I think you have a nice set-up. I don't see anything wrong. I like it. The TV cabinet is not too big and the window does not throw anything off.

I agree with @tracefloyd. The cabinet does not look too big and the window is fine. I see nothing that needs to be changed. If you want more balance you could hang something on the wall below the window but I am not sure if that would interfere with the fireplace.

I need to see entire room.

I would say to hang something larger to the left of the TV to balance out the window.

Tv stand is a perfect size. You could hang the tv 3-4” above it if you prefer, or leave it where it is.

The oddest thing I see is the lamp on the left. It seems too close to the tv.

I agree with littlebug that the lamp is too close to the TV. I like the look of this plug-in sconce in your room.

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Building on what ffpalms showed here are a few more suggestions. Slide TV unit over 6” toward stove. Move wood mix to other side of stove away from focal wall. Change end table to a smaller scale. Add white vases to narrow window. Add tall narrow art piece to left wall of TV wall. Might add greenery to right of TV.

I love the way the long, vertical art looks - all Flo’s suggestions make the room look very balanced.

Items I put into board.

*auto correct changed “box” to “mix”. I meant the move the wood box to other side of stove.

I agree with the others and think the tv and stand look good.