Guest services would be my thought, if you are unhappy with anything in the park.
I did this once with a very very rude ride operator on AE and went to guest services. I told them of my problem and they did not write a single thing down, the person's name or what my complaint was about. When I asked them to take my name and number to have a supervisor call me about this, they told me that was not necessary.
I had very little confidence anything was ever said to the employee, maybe they just let me vent. They were all very, very nice as I shared my complaint, and I felt heard.
Being this is a potential safety issue, that might be different.
I suspect they are doing this to get people through, not to make some sort of quota.