Stay until the traffic clears
The end of the show/event is worth watching.
You get to savor the experience.
You can talk with those with you.
You can help someone who needs it.
Consider that the time is already spent. You can relax with the above, or you can sit in frustrating traffic.
Consider that the money is already spent. You don’t get a refund by cutting it short.
Consider that you’re worth it. And you’re smart enough to be patient.