In my case, were extractions needed for an orthodontic treatment? (photos)

I had 3 first premolars extracted (1 on the top right side and 2 on the bottom) as part of a bad orthodontic treatment. Apparently this dentist didn't know anything about orthodontics, as all he ever did was put brackets and wires. The results were awful. Now, looking at how my teeth were before I'm convinced that the extractions were completely unnecessary! It's making me so depressed. So my question is, based on the pictures, was there a good reason to extract teeth? Or any reason at all?!

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