I have changed providers so no I didn’t bother with complaining. Complaining seems to mark you out as a “crank”.
I wanted to post my experience so people would understand MRI is a difficult procedure. I was in the machine for 45 minutes. (15 minutes for my neck, immediately followed by 30 minutes for my head). I had NO idea what I was in for! If I ever have another I will take my own ear protection.
I doubt I would ever agree to have it done again.
Perhaps I would have gone into tinnitus and hyperacusis eventually anyway, but it was certainly triggered by my experience.