It's all science fiction, stuff I like to think about just before I go to sleep. But I like to pretend this is what happened to time, why it is only one way. see, once you pass the event horizon of a black hole it effectively removes a half dimension from reality(you can't go back towards the horizon) time is that half dimension we are missing.
It isn't just science fiction, the Schwarzschild radius of the universe is massively larger than the universe itself, we are living in a black hole according to current math.
And in theory a black hole whose density gets lower than the density of the universe will grows its event horizon to fill the entire universe. Such a large black hole doesn't have strong tidal forces, so you wouldn't even notice as you entered it, from the outside it would look like the black hole disappeared and the internals popped out rather than you entering it.
At least that is what the math says. Likely there are some more strangeness as you enter the event horizon, since at that point you effectively pass the speed of light barrier, creating infinite time dilation (a gravitational difference is equivalent to a speed difference in relativity, and the anent horizon is when that becomes the speed of light). That means we have no math to explain how time inside the black hole is related to time outside.
So while the space tidal forces wont rip you apart space wise, the time dilation difference between your different parts would be infinite, since at the event horizon one part of you will see the other part as having infinite time dilation, I'm not sure how you could get through that unscathed. The particles might still be next to each other, but you might turn to dust from infinite time passing resulting in infinite particle decay, basically resetting the state of your matter.
I did study all this math in a masters degree, I am not a working physicist but I think this is a much more reasonable interpretation and also more testable than the prevailing ones about black holes. All the math of the testable parts adds up, while the prevailing theories are wrong since the universe isn't a singularity.
Edit; Note that extremely few physicists are even researching GR seriously, barely any work has been done on it since the Einstein days, quantum field theory is where all the useful applications and hence money is at, it also has way more testable results, so almost all physicists are approaching the problem from that angle. The few who do study GR are mostly focusing on the raw math and not interpretations, since math is publishable and interpretations are not, also since GR requires so high level math that basically only those who love math over nature even wants to study it.
Case in point, Einstein himself didn't understand GR math, today he wouldn't be able to publish any GR research even though he invented the theory.
