I'll be honest even though I'm in the minority.
I don't think this was a good choice of words on your part. It's offensive to a team that thought it was important for your daughter to have a weight check in the office in December. We can't know your tone, but my guess would be that the conversation sort of "inflamed" the receptionist, who then, in turn, inflamed the doctor about it, who reacted angrily with his words....
It broke down into a power struggle, essentially.
I think you should take a deep breath and think more about it. You are in a partnership with your medical team with the shared goal of your DD's health. Don't you think the same thing will come up with another provider? Do what you want, but I think it's important to show you're on board with the plan of care for your DD and if you don't think she needs to be weighed in the office, it's probably something you should negotiate at your visit in direct conversation with the doctor. Also, it's really not a complete waste of time, it's an assessment of how she's doing with her nutritional goals. I think it's good to have a doctor that cares so much. YMMV
BTW, all of us have bad days; bad moments. Even parents and doctors. I'm sure, if you decided to, you could have a conversation with the doctor and sort of "start over"; clean the slate. But that's up to you. I just suspect that this is probably going to be an ongoing issue that you're sensitive to, that may come up no matter who you see. Oh, and I wouldn't be happy about a co-pay like that for a weight check, either. But again, maybe it's something you could talk directly to the doctor about - he may not even realize there's a charge associated with it. At the very least, it's a better reason to say than "it's a complete waste of time", kwim?