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Or the person who gifted this to OP after eating the bunny
Unlikely. The simplest explanation is generally most plausible, either:
OP got an already opened box from someone, failed to notice the box was already open, failed to read the text in the box, failed to notice the prominent chocolate bunny on the box, failed to understand the purpose of the cardboard in the box, accidentally obscured text on the box with poor lighting, unintentionally took a misleading picture, and posted it into the internet as a genuine complaint.
Or, OP saw protective cardboard around a fragile hollow chocolate egg and decided to lie on the internet.