If you choose a different dietitian, make sure they are very familiar with bariatrics. I went to one before surgery, and she was not very knowledgeable about life after WLS.
I have been so lucky with my dieticians. Right from the get go, pre surgery, I was given their mobile numbers for questions. They have done everything I needed them to. I have another 6 months of care with them and I will miss them checking in with me.
I really do believe you deserve and need a good team behind you because all this is new and takes some getting used too. I needed so much help and plenty of advice early on. If your dietician is not up to the job then I believe you need to tell your surgeon because you need the best and he/ she may not know that they are not up to the mark