You found it interesting. I found it bland and unremarkable. Here's how two intelligent people can come to these entirely opposing conclusions.
Stories are interesting when they are emotionally compelling, when they fulfill a psychological need of the viewer, or when they are well-crafted. Any combination of two of these factors is likely to create a hit.
(Combine three and you're Pixar or James Cameron; you have a license to print money.)
Some viewers may have a psychological need fulfilled when they see Faiz's ending and are pleased that it fits their view of day-to-day reality. I would guess this happened with you. For most viewers (me included), this level of engagement with the material is enough to be wholly satisfying.
Now, my psychological needs are probably very different from your psychological needs, since we are very different people. I found Faiz's depiction of reality exaggerated and unrealistic, so it didn't affirm my views. I was not pleased on that level.
Now, Faiz's ending could still in theory resonate with me if I found the basic narrative emotionally compelling or if I found the ending well-crafted. I could never invest emotionally in Faiz since I found its characters and world too exaggerated, so that level is right out.
That strips my reaction down to "Was it well-crafted?" because, as a viewer, that is what I happen to care about the most. (Other people will focus primarily on other levels; everyone's different.) As far as that goes, I feel Faiz's open ending was not well-written or implemented.
So, I dislike it. But you can disagree with me without either of us coming to fundamentally wrong or unsupported conclusions about the show. We just went to it with different priorities and different worldviews.
