I thought Joy-Cons were the only ones with this problem. I've only had these controllers for two weeks (maybe even less) and the left side is drifting in game. I placed a replacement order and even a week after the new ones arrived they started drifting too! Also, the grip can get a bit awkward as you can't wrap your fingers around it like you can with the Pro Controller. I'll just stick with the joycons as I'm still not having any drift issues, knock on wood.