Pfizer rushed their trials and used their lobbying power to attempt to increase profits from the pandemic. Later data from the real world showed that their efficacy scores were lower than in the initial trials and not that much higher than rival cheaper vaccines.
Pfizer also did all these ethically dubious things without having enough manufacturing capacity to fulfill potential orders from the whole world, making it somewhat needlessly damaging
the stuff in the first paragraph
The bad things happening in ttheir trials were covered up and no attempt was made to address them before they got approval. Rival vaccine makers had reported various mistakes made in the trials and suffered delays due to having to rectify them
Pfizer also got the US media to run hit pieces on rival vaccines from other nations to attempt to boost sales.
Pfizer’s contract with various nations included various clauses allowing them to seize national assets