I found the bars needed to be parallel to the tongue. I would redo the installation by first changing the L brackets. Then you will have to reset the hitch head angle to get the right amount of weight distribution. Measuring the height at the front fender will get you close. Then it is best to check by weighing your setup as described in various threads on this forum.
The wear marks on the L bracket should be even across the L bar.
Also - I find it is necessary to check the torque on the hitch parts, especially the L brackets. I have now put bright red nail polish on all the nuts so I can check visually that they have not moved.