counterendorsements
A counterendorsement is a public statement by an individual or group that opposes or withdraws support from a person, policy, or product that has already received an endorsement. This action can occur in various contexts, including politics, business, and social movements. In politics, a counterendorsement might be issued by a prominent figure from one party to signal disapproval of a candidate from an opposing party, or it could be a statement from within a party to distance themselves from a controversial nominee.
In the business world, a counterendorsement can manifest as a competitor publicly criticizing a rival's product