You could unleash an army of Ultron style helpers for the first couple of centuries to monitor humans and curb their worst instincts.

After a few generations of monitoring humans to ensure that the ways in which they generally traumatize each other are minimized, you can use those Ultron-bots to model better behaviors and eventually take your hands off the reigns.

In other words, even if an AI had to 'use force' with us, that doesn't necessarily mean it's necessary to kill everyone. Remember, all the resources humans need are literally already here, 2 things are happening:

1. It's really a vampiric-oligarch class that has been distributing those resources unevenly due to a miscalibrated technology called "the state".
2. The vast majority of poor human behavior has been caused by the long chain of abuse necessary to enable "the state".
3. Get rid of the state and you solve most of the issues, not the individual humans.