US Nails

Not only did i wait over 2 hours to get my nails done but when she did my nails it was a bit painful. Some of my nails were crooked and when I pointed it out she said "thats how they're supposed to be". Not only that but acrylics are supposed to last up to 3 or 4 weeks, correct? I had both my index finger nails fall off within the first week of having them done. It was my first time going and also my last.