Sound Anchors are OK but I do not think they make a set for the LRS yet.
You might have to wait a little. You want the middle of the long axis of the speaker aimed right at your head. Also, Draw a perpendicular from the middle of the speaker to the from wall. Get Acoustic Tiles like these
https://www.parts-express.com/sonic-barrier-fwp122-studio-acoustic-foam-wedge-panel-12-x-12-x-2-black-12-pack--260-547 and use double sided carpet tape to stick them to the front wall 2 wide and 6 high centered on your perpendicular. You may notice a slight drop in high frequencies but your image will improve quite a bit.
You might have to wait a little. You want the middle of the long axis of the speaker aimed right at your head. Also, Draw a perpendicular from the middle of the speaker to the from wall. Get Acoustic Tiles like these
https://www.parts-express.com/sonic-barrier-fwp122-studio-acoustic-foam-wedge-panel-12-x-12-x-2-black-12-pack--260-547 and use double sided carpet tape to stick them to the front wall 2 wide and 6 high centered on your perpendicular. You may notice a slight drop in high frequencies but your image will improve quite a bit.