Sound design of a terrible game...

A broken machine effect would be much more erratic. Here it sounds more like there's a lot of contact points constantly colliding and actuators pumping to coincide the servo whirring, which makes sense since it's big mechanical robot limbs moving quickly. You can be sure that if your car didn't have all the sound insulation it has in its cabin and exhaust system, it would be a much more brutal experience on the ears. To say it's not very artistic isn't very fair. It's clear that there's a specific set of "personalities" at play with how they designed each individual javelin's audio profile. Whether or not you like it doesn't change whether or not it's an artistic endeavor.