Meta's warranty should cover controller drift as a hardware defect within the first year, so you're likely in the clear since you bought it two months ago. Start by contacting Meta's support directly through their website or the Meta Quest app - they can often troubleshoot the issue remotely first, but if it's genuinely a defect, they'll process a warranty replacement. You won't need a new box or anything fancy; just have your proof of purchase handy.
The tricky part nobody mentions: make sure you try the basic fixes before contacting support, because they'll ask anyway. Recalibrate the controller in your headset settings, check for firmware updates, and make sure there's no interference from other wireless devices nearby. If those don't work, then you've got a legitimate claim and Meta will move faster.
One thing to keep in mind - if the retailer you bought from has their own return window open (most places give you 14 - 30 days), that might actually be faster than going through Meta's warranty process. Some retailers process hardware returns quicker than manufacturer support does. If you're still within their return period, that could save you some time.