Also the fact that at the actual end of the filmi think the big one was the distances between various objects in orbit being *ridiculously* way too low.
where she's having been in space for weeks or months or whatever, she crash lands in a lake but is able to swim to shore no problem. You ever see astronauts coming back from space after a few weeks? They're fuckin bolloxed in 1G gravity again. Basically, she drowned at the end.