The negative efficacy kicked in once the variants started showing up. Anyone that got vaccinated before they caught COVID while the original strain was circulating benefited from avoiding that strain.
And yes the definition of vaccine had to be changed. And the treatments that had some efficacy had to be covered up in order to preserve EUA authority. And no lessons will be applied to the next pandemic.
Regardless, the ‘vaccine’ saved many lives during the original strain, and was pointless after that. Pandemic science is rarely black and white, there is never a perfect approach.
Dugway, is that you?