My sticking point is the word "terrorism" itself. Words are defined by how we collectively use and understand them, and the common understanding of terrorism involves bombs and bullets, not software and surveillance.
I get your logic, however. You're breaking down the definition into intimidation for political ends, and you're not wrong that coercive control is a form of violence. But the leap to calling it "terrorism" just doesn't work for me. It feels like you've reverse-engineered a justification for a word that, on its face, is hyperbolic in this context. It's an authoritarian nightmare, for sure, but it isn't terrorism.