That really is some fine victim-blaming, but I'm not sure it's grounded in a lot of truth.
Allow me to present you with an alternative narrative; the OP has travelled to the park with his partner. Being a park enthusiast it's likely the visit to the park was either for him, or initiated by him which gives him some skin in the game as to the quality of the overall experience by him and his partner. If you'd been telling your partner that you should really go to Movie World because you hear it's pretty good lately I think you'd be a little embarrassed in front of your partner too when you find the staff scarcely make eye-contact, rides are bereft of themeing, and the host of other legitimate issues identified.
It's no different to talking up a restaurant to your mates (service, food), and then turning up and getting shit food and service. It's not your fault, but you feel a little embarrassed for having suggested it in the first place.
Sure, you might not go to a theme park for the explicit purpose of being greeted by ticket or ride staff, but you should expect that when you have to interact with people representing the brand that they are welcoming, friendly, and knowledgeable as part and parcel of standard operating procedure. You may not expect that lightbulbs are checked nightly, but you similarly should not expect to have an indoor rollercoaster stripped of themeing. Bathrooms are not the reason you go to a theme park, nor is signage, nor is shade, nor is seating - but they are all integral to what you do go to a theme park for.