I think that sums it up well. It sounds like manipulation at it's core. Both can be intertwined, gaslighting/projection as I've seen in my own experiences -the gaslighting aspect- as not being such a clean cut entirely conscious deviously masterminded plot as the movie displays in 'Gaslighting'.
And those projecting may honestly not be self aware in knowing this is what they are doing which is where gaslighting steps in.

The important thing is recognizing that there's some sense of dysfunction and abnormal interactions and become secure enough in truth to see it for what it is in order to not be drawn into the abyss.