Braces for too long? (photos)

5 years ago I received braces because of an over jet. I was originally given 21/2 years, but somehow it has gone on to 5 and counting. my teeth has basically gone in, but I am still not pleased with my smile. I have a tooth that needs to slide into place and one that looks crooked. my lower teeth still need to be straightened, as I have overcrowding. did this really need five years or more?