It will take him until at least next season to become competitive again.
Personally, I think he made a mistake coming back this summer, even though he shot a couple of decent rounds.
I have no sympathy for his off-course woes...you roll the dice, you accept the numbers that pop up. And the flip side of worldwide adulation and prosperity is worldwide scorn and depression. That's the deal you make when you become a celebrity, icon, and household name.
But a reminder to the haters: Tiger has 14 majors. That's more than the next dozen or so current players COMBINED. He has 71 PGA Tour wins over 13 years. It took Nicklaus, Palmer, Watson, Hogan, etc. over two decades to amass that many. He single-handedly catapulted a fringe sport with moderate mainstream appeal into the stratosphere, bringing along every golfer, pro, equipment company, and golf course owner along for the very lucrative ride. That cannot, and should not, be ignored.