Breath of the Wild. Can't stand it, not just as it's a major departure from the general Zelda formula (and Zelda was my favourite franchise), but also just as an open world game compared to others of its time, I think it's a comparatively hollow and empty experience which doesn't give anything. Clearly, this is not the general consensus.
As for games I liked but didn't sell well, there are far too many examples. One example is that King of Fighters is my favourite fighting game franchise and while it does well enough to keep going, it never sells particularly well.









