The thing that makes everything harder is time. I hate time, it's just a giant mess!
I mean... why is everything moving trough the dimension of "time" all the time? Why does everything seems to go in the same direction?
It seems like more you're inside a curvature of space more you move faster inside time. Actually, you also move faster inside space, so it makes sense...? Well, if you was in complete void inside intergalactic space and no gravity source from any direction you should stay still in time too, right? Probably not, instead the illusion is that parts of the universe that contains no visible matter are the ones that expands faster, and they expand faster and faster more is the void that they contain. Probably because they mainly contain dark energy so there is not an opposite force from baryonic matter's curvature of space that opposes the "negative pressure" of dark energy.
It is just so complicated, but I think it's just a matter of time. As soon as we'll fully understand how time works (if we'll ever will) I'm quite sure we'll understand what's wrong with expansion of the universe.
Sorry, I just finished reading this
. I hope it's a normal consequence.