802 D1s need thoughtful placement to perform best. They are not bright and fatiguing in a non-reflective room with the right width and toe angle (zero or near zero).
Placed in a small room with straight, on-axis toe and they can certainly sound boosted in the upper mids/low treble. Keep in mind that B&W voices their speakers knowing that the vast majority of owners will not have them many feet out into a room but instead have them within a foot or two from the forward wall. The resulting boundary gain will go a long way to offsetting otherwise perceived brightness.
If you have tried everything but still dislike them, what is left to do other than cut your losses and sell them?