Just bring her with you or watch the game at home, if you're that desperate to get home haha.
The last few minutes are far from irrelevant, I think. They're pretty important and plenty of games have been decided in those last few minutes. I'd be well annoyed if I was just exiting the stadium and heard the crowd inside cheer for a winning goal.
I get that being stuck in traffic isn't great, but for me it's part of the matchday. I know it'll take me 30-45 minutes just to get out of the carpark, but so be it. That's the price I'm willing to pay for supporting the club.
As I say, it's just my opinion. But I do feel leaving early is like sticking up two fingers to the players.