Los Angeles doesn’t have a meaningful process to contest parking tickets: it’s an automatic denial, regardless of merit. The only way to get actual review is to go to civil court.
That sounds a lot better than I typically hear but one thing I do keep in mind is that some people, especially men, take comments about their driving very personally and react only slightly less strongly than if someone said they were bad in bed. I’ve known a few guys who would rant about tickets as a tax without noticing that nobody who’d seen them driving believed it.