Did my surgeon botch my tummy tuck? Not take enough skin off, or is this normal? (Photos)

Your results look normal for this time period and your surgeon is correct about the swelling. From your photos, I don't see that any additional skin is remaining that could have been removed. Be patient, it will take 4 to 6 months and sometimes up to 12 months for all of your swelling to subside.

Thank you for your question and series of photographs and
I am sorry that your results have not been what you anticipated. It is
difficult without an in-person examination to determine what may be taking
place. Most commonly this is residual swelling from surgery which will
spontaneously resolve but it would be important to voice your concerns to your
surgeon.  Tummy tuck results often take several months to reach your long-term results so I know it is difficult but allow your results more time to mature.  

From the photographs I would have to agree with your surgeon, that you look still swollen. If you had a fair amount of Weight loss prior to your procedure, and the skin redundancy was only taken out horizontally, there still may be some excess that you can see in the vertical dimension. Without a T shaped scar, this vertical access cannot be addressed with a standard tummy tuck. It may take several months for the lymphatics and venous drainage to return such that the step off from the scar to the tissues below it is more flat. Ask your plastic surgeon about a compression garment. Good luck with your continued recovery.