Surely it's not like this in the purchased product but, of course, not even in the Trial, we would have been flooded by reports if it was like that!
Try the following:
- Start a flight from another airport (not necessarily an FSDT one, any default airport will do, provided is far from KLAX)
- Open the Addon Manager menu and deselect the "Force HD textures" option.
- Exit from FSX cleanly, relaunch it and try KLAX.
Try this first, and see if it makes any difference.