Tiger was clearly lost in life after his father passed away. Tiger said that he cheated on Elin because he thought he was entitled to be with lots of women after spending many years focused on golf. Then, when Tiger should have just faded away from golf and had to finally grow up, he shocked the golf world by winning the Masters in 2019. After that, all was forgiven and Tiger was back as the most popular golfer in the world.
I think that contributed to Tiger becoming a complete a@@hole. He just thought that he was exempt from the consequences that normal people face in life. So, he ends up driving 80 mph around curves and nearly kills himself. He passes a tampon to Justin Thomas during a round as a joke and ends up again pissing everyone off at him for cheating on Elin.
Now, he is clearly addicted to pain killers. During an interview at a TGL match, Tiger was shaking and sweating profusely. He was obviously coming down from something. And it has been reported that Tiger won't hire a driver because he thinks he is just fine to drive. This is just a guy who has always gotten what he has wanted in life and faced with the consequences of losing his ability to play golf and his family with Elin has just been adrift and popping pain pills.