...for him (time is no longer rellevent).

I am not so sure about this point or maybe I misunderstood both you and koh

It seems to me that you can not get rid of our natural "human centric " philosphy
The theory claims that all the observers are equivalent
If an astronaut travels at 99 % of the speed of light, from his point of view nothing changes

For him, time is still relevant as before, universe is still there as before

Dont forget that some galaxis travels , from our point of view ,at the speed close to the speed of the light

However when he comes back to earth he finds himself in the future