All they can do is slap your hands and then you can tell them they need to be able to do a better hands on job....see you sooner than 6 months...so you can slap their hands too.
If they resent someone making well thought out educated changes in an effort to improve their therapy...they got a severe God Complex going on and are piss poor doctors.
Especially when what they prescribed is so obviously not working.
If you were diabetic and what was prescribed wasn't doing the job....they either need to be more hands on and fix it or not get their panties all in a wad because you the patient tried to fix it themselves.