Why do ron and harry fight in hp7?

Answer 1

because Ron kept complaining about everything and one day, he has a go at Harry saying that he thought there was a plan and they weren't getting anywhere so Harry argues back and Ron ends up disapparating.

Answer 2

In the last movie, Harry and Ron got into a fight mostly because they were both tired and weary from their journey. On top of this, the trio was taking turns wearing the Horcrux locket, which worsened their mood. After a few months, Ron started to complain about being tired, not getting enough to eat, etc... Eventually he cracked, and shouted at Harry because Harry really had no idea what he was doing, what they wanted to do next. Ron decided he was done with this journey, as he became more frustrated each day, and thought that they really weren't accomplishing anything. One day, after the fight, he just picked up his bags and left.

Answer 3

In Deathly Hallows pt I, Ron is increasingly agitated. Most of this is due to his worrying about his family, who he left in quite a rush to go with Harry and Hermione. That, compounded with the pain of being spliced during a disapparation, led him to be quite cranky. Harry was wandering around blindly, not sure where to look for Horcruxes or what to do, and Ron began to wonder why he had left his family to wander around in the woods, feeling that he could be more useful at home. So, inevitably, Ron and Harry had a falling out.