The issue stems from the number of total pages (329,000) and the proposed record release schedule of 500 pages per month
"FDA proposes to process and produce the non-exempt portions of responsive records at a rate of 500 pages per month. This rate is consistent with processing schedules entered by courts across the country in FOIA cases"
"FDA’s proposed schedule of 500 pages per month is consistent with schedules set by courts across the country, including in cases where the underlying records were of national significance"
"The FDA has proposed to produce 500 pages per month which, based on its calculated number of pages, would mean it would complete its production in nearly 55 years – the year 2076. "
To me this seems like it is more about bureaucracy rather than maliciousness. And in my view a fair criticism of the slow pace that FOIA documents are released.