after films like Gravity and Interstellar, Martian is a big downer for me.

PLot: OK-ish, execution: very bad acting: OK, great actors do good acting at worst.

I couldn't feel the characters or any urgency to act in tight situations. A lot of dialogues seem thrown in and out of flow. Facial expressions seem artificial. Nerds seem making an effort to look like nerds. .. Arggh!

Couldn't at any point in the movie root for any character.

Matt Damon tries to overdo his Serious mood and subtle humor stuff, didn't work, the background music steals the silence and lonely environment one should feel in space.

well, I can rant on.. but in Short: A bad movie I regret watching.