We have a huge window in our living room that faces west. We have never really used the living room before so never really noticed it except that it was always a little warmer in there. I recently put a new sofa and a big tv in there and started using the room. Wow! When sitting on the sofa in the afternoon you can feel the heat coming in the window behind you. Am currently looking for solar screens to fit that window.
In the past, houses were fitted with awnings, which would deflect most of the sunlight from coming in during summer. After summer, you would take down the awning, and sunlight would be able to come in and keep you warmer in the winter.
You should plant a large tree by that window. Almost all our exterior area is covered by shadows due to the many trees so only a small area is hit by sunlight. It makes a big difference.
Design a nice-looking trellis to put up a few feet away from that window. Plant a fast-growing leafy vine, hopefully one that blooms for aesthetic value, to cover it in summer months. Cut it back and let the sun in, in cooler months. Deciduous trees will do the same thing, but it takes a whole lot longer to shade the whole side of a house than a vine.
I planted a cherry tree in front of our living room window that faces west. I have a couch against that wall. In spring and summer it's full of leaves but not so many that I can't see through it, but it blocks most of the heat from the sun. In the fall and winter the leaves fall away, allowing all the sunlight in. And it's pretty seeing all the blossoms and cherries in spring.