You are not too much. Your therapist was not good enough at his job, that is a reflection of his skill level not of your level of need.

One of the cruelties of this situation is that you have not been given the opportunity to process this. Without the chance to discuss what has happened, it will be really hard for you to sort out your feelings from his inadequacies and it is not surprising that you are internalizing his failings and assuming them as your own. He is at fault, you are not faulty and I can't emphasise that enough.