The thing about experiences/qualia is that they aren't just subjective, but momentary. Any sense of permanence, continuing identity or indeed of experiences being "about" something in particular is ultimately linked to our memory, which is not part of the "hard problem" itself; it fits solidly within the structure of causal relations we usually call "reality", or just "the physical universe". So the hard problem is hard, but it's also very tightly constrained; it "only" has to explain tiny fragments of subjective experience that float in and out of existence.