It's not like Unreal was ever a great franchise, at least the single player installments.
Unreal 1 was Epic copying Quake, only they went hyper on the color and giant outdoor environments. It was technically marvelous, but I don't think anyone looks back at anything in Unreal that fondly. Maybe the opening sequence where the first Skaarj chases through a dark hallway.
It's no surprise Unreal 2 was a giant turd. It's not like they were building off some classic in the first place.
Unreal's street cred mainly comes from the UT series, and even then, you're talking about two installments out of 4 having any sort of big impact on gaming, and really, most people simp on UT2K4 because it was more like UT99 than any of the other installments.