my list is not bought and returned but speakers I’ve been disappointed in and offloaded probably longer than I should have. So excuse me… little different than your question.
Dynaudio Contour 20. Tried for a while and really tried to like them. Maybe didn’t have the power they needed but just way too smooth and no real dynamics. Loved the little Dyn focus 140s years ago, they were super fun and refined enough.
Pioneer S-1ex. Man did I try to love these speakers! They did some things amazing. They are definitely not for a rock guy of any type. Great bass! …… 0 mid bass punch , like nothing.
Ahhh.. When I lived in Shanghai I bought a Chinese brand HiVi pair of towers that were toughted all over the internet as “ good as BW 800 series”, giant killer yada yada. What a piece of Sh.t that was. Tried to return them the next day but …. Yeah American probably overpaid for their POS speaker at the fancy mall they ain’t takin it back. Tried to sell them for penny’s on the dollar on the Chinese market and finally basically gave them away. Those were the worst.