That's weird, I've had a Model 3 since 2018 and it definitely used to have some issues with phantom braking, but for the last ~year it seems to be totally fixed (at least for highway driving, still sometimes gets confused on surface roads). Even in the past though I never had anything close to what you're describing where the car slams on the brakes every 10 minutes in good conditions.

Are you running an old software version? You might try bringing it in for service because what you're describing definitely doesn't seem right.