Yes, it's still nominally a democratic republic, but it IS authoritarian and it IS plutocratic. Don't blind yourself to your country's faults - because the enemy sure as hell won't. What you can't see, you can't see being exploited by the enemy.
Authoritarian: highest incarceration rate on Earth (exceeding China and Russia combined), militarization of police (armored cars, military weapons, systemic use of no-knock entries, etc), tough-on-crime feedback loop, death penalty (with approx 8% known false positive rate according to the states' own judicial records), mandatory sentencing, three-strikes laws, weaponization of plea bargaining, asset seizure feedback loops, free speech zones, secret orders, secret courts, warrant-less mass surveillance, suspensions of habeas corpus, etc, etc.
Plutocratic: extreme wealth inequality, increasing population below poverty line, increasing corporate subsidization, byzantine economic system, high-level revolving-door positions in the corporate and government sectors, electoral and judicial outcomes extremely and highly dependent on private wealth respectively.