I have read the expression you better not try in several texts. Is it ok to switch you with one? I.e.,:
One better not try to do [...].
Here is an example of a full sentence:
United Airlines' website sometimes doesn't allow customers to cancel the ticket, but instead ask to call the customer service. This means one better not try to cancel after 23 hours and 59 minutes after the purchase of the flight ticket.
I couldn't find any use of "one better not try to" on Google.