The film Gravity is awful because:

The dialogue between the characters is unrealistic. The characters themselves are unrealistic. You find yourself wondering why the lead character was allowed on the mission in the first place.

Then the real problems start. The physics is all wrong! ALL OF IT! The film is so heavily based around bastardised physics that it becomes unwatchable. The reason for this is that most of the events which occur in the film would never occur in real life. This film is supposed to be a thriller/drama/realistic horror? Yet it can be neither of these things. There is no realism in terms of the characters, their interaction between one another, the "geography" of space, or the science upon which the whole film is based. The lack of realism in a film that depends on it for its narrative and genre means that it loses all credibility and thus fails altogether.

Also, why call a film "Gravity" when as far as the astronauts are concerned, there is effectively none of it. Indeed, my repulsion to this film is far stronger than the micro-gravity that wouldn't be experienced by the astronauts because it would be too small to notice. One can only presume that they subconsciously called it gravity, on account of how weak it is. It is afterall, the weakest of the forces. Which is why Starwars is so much better.