Moderna first, then J&J, then Pfizer means someone who is a high reporter of issues bought in those orders. It doesn't mean anything regarding the quality of the item at the time.

All batches are toxic. The ones which seem safe were probably smaller batches, or batches where a large amount was damaged in shipment and not used, or something of that nature. You cannot compare vastly different numbers with incomplete data and expect to walk away with any reliable conclusions.