It meshes well with my occasional feeling that reality is just circling the drain.

actually, we are inside the dream of someone else, and that one too is again in a dream ...

It doesn't answer where it all came from. Whatever theory or religion you choose, there's no answer to this question apart from it suddenly appeared which implies something can be created out of nothing and that creates a whole lot of new questions and possibilities.

It's also just whitehole theory which is possible but we've never seen one and we likely should have by now.