Then bring all of it out in the open! Post it. Including the video. True, you were told about the kink, so there was no misrepresentation. But you were told the kink didn't seem to bother the snake.
So here are my questions.
What does the snake weigh now? What did it weigh when you got it? How often has it fed for the breeder and what did he feed it ?
You say the bad problem started after the snake ate its first meal with you ? What exactly happened during that feed? Was the snake able to kill (unless f/t) constrict and eat it without problem? With problems? Was the tail limp and the snake flailing BEFORE that meal and after you got it ?