I had to leave a job because everything the boss was publishing was a lie. Another post-doc quit the same week I did, for the same reason.
The company I worked for sent 3 scientists to visit a University lab that published a paper that seemed to solve a problem we had. When they got there the Professor told them they had been unable to replicate the work and the student graduated and returned to Pakistan. Even though it was a fraud he hadn’t bothered to retract the paper.