My x1 carbon gave me nothing but trouble from the beginning. I couldn't even move it too fast lest I risked it locking up. Additionally, my wrist strain got considerably better after ditching it for a comparably priced M2 that blows it out of the water in every conceivable category.
Sounds like you got a lemon. I also have an X1 carbon, and it's been a great upgrade for me. My biggest complaint is the eraser isn't as easy to use as my old toshiba. The eraser is important to me -- my hand gets numb using a trackpad.
