Regime just means ruling system. Western media prefers to use it as a shorthand for autocratic governments so it gotten a bad conotation, but any ruling system can be described as a regime, regardless of if you like it or not. The organization you work at has a "regime"

> I generally use 'regime' for autocratic governments

Which is fine.

"In theory, the term need not imply anything about the particular government to which it relates, and most social scientists use it in a normative and neutral manner. The term, though, can be used in a political context. It is used colloquially by some, such as government officials, media journalists, and policy makers, when referring to governments that they believe are repressive, undemocratic, or illegitimate or simply do not square with the person’s own view of the world. Used in this context, the concept of regime communicates a sense of ideological or moral disapproval or political opposition" [1].

[1] https://www.britannica.com/topic/regime

There is no precise definition. English has many synonyms where the formal meaning is the same, but one is used pejoratively because it's acquired a bad association. Regime is like that, formally it just means the rule of a particular party or system. It can still be used neutrally if not denoting a government.

Iran also had elections, were they manipulated? I do not know. Were US people were manipulated using social media for elections. I do not know either.

> Trump is democratically elected, for now.

He was convicted felon before the election, I cannot believe that he won.