Oh... What? But... Yeah... OK... So...

https://www.youtube.com/c/veritasium/videos

I still kinda have this issue with the CMB, though.

If the speed of light is not the same in all directions to the extend that it's c/2 in one direction and inf in the opposite, then that means that when we look one direction, we see that the universe was hot and dense in the past, and when we look the other direction, we see the universe is hot and dense right now, in the naive sense of now.

Which I guess isn't necessarily a problem, but it kinda throws cosmology on its head when it comes to determining the age of the universe. It destroys the Hubble Constant, too.