If you ever waited for a bus in LA for an hour only to see it come and not stop for you, you would feel differently. Even though a lot of people take the bus in LA, buses aren't really the cities priority.
It has considerably improved in the 10 years I've had to take them but they are hardly reliable. You cannot take the bus without planning ahead.
For the bunching problem, we can't simply add more buses because they will end up being empty. We can't have too few because it already feels like there are too few.
I really hope there is a solution in the near future.