You can make it work, unless you are looking to spend money on new furniture?

You need a much larger rug, but I would stay away from one with any more brown in it.

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Agree with chispa that you need a much larger rug. Sometimes a broadloom cut to size and serged or bound works great if you can’t find one large enough. Adding in some art and curtains would help. Yes, stay away from adding more brown. If you have no plans to repaint walls, try to find something that brings in the wall color. Bring in some side tables and lamps, as well. Right now you just have a brown floor with a giant reddish brown sectional and a rug that’s too small, so that’s all you see. Adding decorative elements will bring your eyes up.

I would move sectional from the wall with widow, get a sofa table/console behind sectional with décor as ELLE décor shows us plus side tables, coffee table...etc.

or follow for Z Gallerie idea