Ouch, that's definitely premature wear, even for desert conditions! Tire wear can be affected by a lot of things, like driving style, tire pressure, and alignment, but still, that seems really low. For desert driving, you'll want something that can handle the heat and dry conditions. All-season tires are probably your best bet, but look for ones with a higher treadwear rating for better longevity. Brands like Michelin, Continental, and Bridgestone often have good options for this. Since you're mostly on local roads, you probably don't need super high-performance tires. Talk to a reputable tire shop coz they can give you personalized recommendations based on your specific driving needs and the make/model of your Ariya. They might also be able to tell you if there was anything unusual that contributed to the rapid wear.