If your Xbox One Wireless Controller has a malfunctioning thumbstick and you cannot properly navigate around your Xbox One, see the Xbox One Wireless Controller Has Malfunctioning Thumbsticks problem page for possible problems and solutions.
This is usually caused by bad analog sticks. In most situations, these controllers are out of warranty and it is easy to recommend the repair, but yours is so new I wouldn't recommend repairing it. In this scenario, contact Microsoft and request a replacement controller. It will likely be new since it doesn't make sense for Microsoft to refurbish them.
If they don't want the broken controller back, the sticks can be replaced without a new bottom board. However, this is time-consuming and should be done in pairs. The reason for this is one stick failing usually means the other stick that still works usually isn't far off from failing as well. Yes, this adds time but you're better off doing them as a pair and fixing the issue for good.