If you're willing to learn a little, read the
Signal Analysis FAQ that's linked to at the top of your report. It's an easy read, and is very comprehensive.
As you might guess, reception in LA is a matter of having a clear view of Mt. Wilson. Those with a clear view can get over 100 channels while those without my get 5, and may not get all the major networks. One feature that makes this site unique is the ability to determine the path TV signals will need to take to get to you. Based on your report, you don't have a clear view, and the predicted signal strengths have been downgraded accordingly. (Read the FAQ to understand which numbers to pay attention to.) CBS may be the hardest of the networks to catch.
Electron has recommended a large antenna that is designed to receive all TV channels from 2 to 51 (the REAL channels in your report.) I offer a second choice, the Winegard HD7698P, which is not sensitive to RF (Real) channels 2-6. There's only one weak low-power station in that band for you which probably is not worth the extra effort. You can determine what all the channels and subchannels carry with
this page. You have to click on the call sign or choose "expand all" to see the details.
Your report is a bit discouraging because the prediction model used here does not expect enough scattering over the hill to provide strong signals. I know that one person in the Inland Empire we helped ended up with much better resultes than predicted, as the prediction model underestimated how much scattering would bend down to fill in the shadowed area. Good Luck!