Draw a room layout. Measure the walls, the openings, doors and window. Do a one inch equals one foot scale. You'll get the most helpful feedback!

Good luck!

The pics are too dark so open the drapes turn on all the lights and then post the new pics here in a comment do not start another post. Yes we need a to scale floor plan and also do you need all the furniture in there ?

I don't think your back wall is working. The room does not need to be divided into zones. Remove the corner dsplay case and corner desk and window seat to another room. Center the seating arrangement and carpet in the room to create one unified space.

TV is the rectangle at the lower edge.

Do you really require seating for 8 people all the time? I would eliminate the one leather/vinyl sofa from the room. There's too much stuff in a room that's too small.

I would eliminate the walkway to the desk and place it in a different corner.

repainting the room in a much lighter color and changing out the window coverings would help lighten the space and your large furniture wouldn't seem to fill the space.