Advice of an experienced eicker 1:

At the interview, always answer the truth to the question "why did you leave your previous job?" Because the reputation is false or silence plays against you.

Advice of an experienced eicker 2:

At an interview, never answer the truth to the question “why did you leave your previous job?” because the reputation of a whistleblower who simply tells the secrets of the boss (even the former), plays against you.