I am surprised by the responses here. I went on Meraviglia in March and thought the food quality was poor. Were there items that were okay to eat? Yes. Did I starve on the ship? No. I have been on a lot of cruises over the last 40 years or so, and in general have found food quality on cruise ships to be on the decline over the years, even before the pandemic. It is tough to compare Meraviglia this past March to what they might be serving on RCL currently, although I found RCL food quality to really decline between 2010-2017.
As far as Meraviglia, the dinners in the MDR weren't of terrible quality, but there were more limited options compared to other ships I have been on, even on small things like ice cream selection. The buffet at lunch did have some things like salad bar and pizza that I though were good, but there were fewer options than previous cruises, and some of the options were odd. For example in the "Mexican" section they offered chips and cheese sauce. The chips were made out of fried wonton skins, and the cheese sauce was room temperature and did not seem to include any cheese (more like colored mayonnaise?). For the waffles in the morning there was a berry topping, but it seemed to be mostly made out of currants. Overall, there was plenty of quantity, but not a lot that was super appealing. That said, I do enjoy their pizza. We did not stay in the Yacht Club, so can't speak to food quality there. We opted to dine in the specialty restaurants for 4 nights and we found quality of food to be significantly better there. This said, things might be different now on Meraviglia - the lead chef may have been switched out, and our cruise had few passengers (and there were still a lot of Covid-related supply issues at that time), so things might have improved. We were definitely not impressed by the food on Meraviglia. You won't starve, but maybe not the best dining experience.