I have seen The Martian aswell and I love it. That' s why I have watched it more than once.
His situation was totaly extreme as he wasn't even on the Earth. And he had no one to count on or ask advice e.t.c.
It actually showes how strong people are available to survive in any situation. But only mentaly strong persons.
Mark Watney survived thanks to his knowledge of botanics.
And in real life it is the same - weak persons will give up in hard situations, especially when they are alone.
But this movie was very motivating- suggestions to watch it 😊