Sorry for the delay in response.
Are referring to the auto smoothing that occurs when you use "Draw free form" tool under comments?
If yes, sorry to say there is no option to disable the auto smoothing.
Please let us know if you are referring to something else.
Well, yes I was reffering exactly to this. It's unfortunate that there's no option to disable it, becasue with wacom this feature makes it just useless to use tablets. It basically makes every single letter unreadable.
Another thread suggested turning off Windows Ink (if you're using Windows) in the Mapping section of the tablet settings to solve this. It worked for me.