A recent survey featured the complaints of Metro authorities regarding failure to increase bus ridership. The expansion of the Expo Line in May, 2016, resulted in many former bus riders taking the train. The authorities also admitted the buses are caught in the same traffic as other vehicles, and they can’t promise faster ride times.
Another factor is the uncertainty over when the bus will actually show up. This morning my bus was 13 minutes late, and that was at the first stop! You can inquire by text, but the answer may not be accurate. Getting out of Century City is often much like a Stephen King story, or the Twilight Zone. The text says the bus is arriving, but still it is not there.
Angelenos are mostly impatient. If they are in a car, at least they feel like they are moving, or about to move. Just standing at a bus stop, waiting, not so good.