Loud Low Flying Planes at Night From LAX

Why are Australia and New Zealand bound flights taking off to the East at LAX between 10pm-12am and sometimes later?  Loud low flying planes are now coming over Hermosa Beach and Manhattan Beach at elevations of 3,000-5,000 feet while people are trying to fall asleep.  You could imagine at 11pm at night when your kids are trying to sleep that it is extremely loud and can shake the house.  Several thousand residents are starting to complain about an open Facebook forum and we decided to publish an article to see if we could get a response.

We have documented American, Qantas and Air New Zealand flights to Australia and New Zealand taking off to the East from LAX.  Why do these Australia and New Zealand bound flights consistently take off overland to the East between 10pm & 12 am?  This is just not one night.  It has been happening very regularly.

  

Can someone please explain why the hundreds of other flights take off to the West over the ocean like this below? Several aviation experts have said that it is because of the wind direction.   However, then why are hundreds of other flights taking off to the West over the ocean like normal flight.  See the maps below.  I am not buying this explanation because it is happening too frequently.