As much as I’d like to use public transport, even with LA traffic on a Thursday (for those who don’t know, Thursdays are always the worst in LA), even when the 405 is a parking lot, taking the metro / bus is still at least 2x slower than driving. Yes I tried, it’s that ridiculous. There are a lot of ongoing projects to build and extend metro lines, new bike lanes, etc. but progress is very slow. As others have said, the whole metropolitan area was designed with cars, and only cars in mind.