Allende chose Pinochet to be the Commander-in-Chief of the Chilean Armed Forces because Pinochet was highly respected as an uncorruptible man devoted to the Chilean Constitution.

Which is exactly why Pinochet led the coup which ousted the corrupt communist Allende.

And why Pinochet stepped down after the referendum.

Were there excesses?  Yes.  If Pinochet was a communist like Lenin, Map, Castro, Che, Chavez, etc. the fascist left would love him.