Warning: the $40 'pro' controller I bought for my Xbox just cost me a ranked match
The left stick started drifting hard three days after the return window closed, and I lost a 2-1 overtime game in Rocket League because my car kept pulling right on every aerial, so if you're thinking about saving a few bucks on a third-party pad, check the deadzone in the first 48 hours or you're stuck with it like I am.
Check the deadzone right when you unbox it, not just in the first 48 hours, since most stores give you 14 to 30 days to return a bad pad. Stick drift is a hardware thing, so no setting is gonna fix it once it starts pulling your car.