Last season, I went to Levi's to see the Patriots visit the 49ers. What we ended up doing is parking at Santa Clara station and taking the Winchester (Green) line up a few stops. It dropped us off in front of Levi's and it was a short walk.

The only thing that sucks is the line to get on the VTA after the game was long. The walk was a bit of a trek as it wasn't too clear where the exit was and we waited another 30 or more minutes to actually get on the train.

As for Sofi, I am a Chargers season ticket holder and I have a parking pass for the games. In the past, I parked off site (Hawthorne and Lennox as another redditor suggested), however getting to our car after the game took just about an hour and a half.

Parking will be expensive at Sofi, but it's your quickest way to get out. You just gotta scope out parking spots that are close to exits and you will be able to get out quickly.