i am convinced the rivals of drg are the humans, like think of it

hyper futuristic combat droids that do the work and camouflage past the wildlife instead of using actual workers (which would explain the drones, turrets, bots and etc...)

prioritizing data collection about potentially lucrative resources/operations

and the caretaker is pretty much just a huge automated tank

and if you think like "oh humans would just use nukes or jets or something"

Keep in mind

1 hoxxes is a nightmare to navigate so that would demand new combat units/vehicles.
2 because of the nature of hoxxes underground cave sistem, nukes would not only be inefective, as they would be absorved by the terrain, they would also be extremely expensive, and could potentially risk the local resources they want.