Not going to tell anyone to watch it or not, in my opinion it was the most realistic ending as if he was survived it would have been like typical. Of course a bit dragged out but personally, I like movies like Interstellar, Gravity, Martian ... They all have different story so has this one.
There were so many technical glitches also, hence wouldn’t rate as Gravity or Interstellar.
“I’m going home” was a very strong dialogue. It sums up everything.