Personally I think making a deal with the Taliban was a bad idea. Leaving the Afghan government out of those discussions was a mistake that demoralized the Afghan forces according to our former ambassador (https://www.businessinsider.com/former-us-ambassador-afghani...). But, it does seem like the conditions of this deal were not met and there wouldn't have been an exit on the May timeline, since the Taliban still continues to work with Al Qaeda.
Personally I think making a deal with the Taliban was a bad idea. Leaving the Afghan government out of those discussions was a mistake that demoralized the Afghan forces according to our former ambassador (https://www.businessinsider.com/former-us-ambassador-afghani...). But, it does seem like the conditions of this deal were not met and there wouldn't have been an exit on the May timeline, since the Taliban still continues to work with Al Qaeda.