I went through a whole play-through, reached level 30, finally managed to beat the Crucible area, and received 2 unique items as a reward (this was my first time seeing any unique items).
The unique items? A rapier I couldn’t use because of stats, and a shield that was worse than the one I was currently using (current shield is a “rare” drop from a crucible enemy). I don’t mind that unique items are super rare because it makes it so much more enjoyable when you finally get one, but having them be worse than or equal to rare/cursed items doesn’t seem right considering just how hard they are to get (echo knight is insanely tough). Maybe the other unique items are better and I just had bad luck with mine though