If you bought the drone from Amazon/Adorama your beef is with them, not DJI. Amazon/Adorama will have to at least honour whatever legal minimum warranty sales law gives you. And there’s been enough written on these forums for any reader to...
That's the (in)accuracy you can expect with consumer-grade GPS.
Understanding this limitation, you just need to plan for it and avoid putting waypoints close to obstacles.
If it isn’t broken, don’t try to fix it! Unless there is either a guaranteed fix for something that isn’t working that I need, or a shiny new feature that I couldn’t do without I try to resist loading new firmware before allowing others to...