The physical conditions in the internment camps were unpleasant, but not brutal. Internees said that the psychological and emotional conditions were what really made the camps bad.
Physically, the camps were not pleasant. The people lived in hastily made wooden barracks. The walls were not insulated or really all that well made, so the barracks were cold and often pretty dusty or sandy because of cracks in the walls. Each family (or even groups of individuals who weren't related) was put into a one room apartment so there was not really any privacy. Bathrooms and kitchens were communal. Children went to school, but there was not really all that much for the adults to do.
The physical conditions were not great, but what was really bad about the camps was the emotional state of the people who had been pulled from their productive lives and put there for no really good reason.