Room is way too bright.

You could do something as simple as hang some blankets in front of the windows when you listen — that’d probably help a lot and would be very cheap if not very elegant.  Curtains would obviously be a better but much pricier solution.  Another way to go would be to use some form of digital equalization/room correction that would likely very effectively address the issue.  Best of luck. 

EQ. 

verticle blinds can be had using softer fabric. Also, a much better solution, I did one room where a largest window behind the listener was fitted with plywood covered with glued on acoustic foam panels. Looked good and worked great and was easily removable if need be.