I am 50 and travel in L.A. traffic too (west SF valley, to be exact) and find drop bar works just fine. And I will mirror what was already said, have your fit checked. No reason to suffer on your bike. None.
When I started commuting, my new commuter bike had drop bars but was uncomfortable so I thought I needed a flat-bar bike. I converted my commuter to flat bar. Mistake. It was slower and I now had only one hand position. I had blamed drop bars, when the problem was how that bike was setup. I switched back to drop bar, getting a bar in the same shape I found works well on my road bike- and in the correct size. I got shims for the brake levers to bring them to my stubby little fingers, set the bar height a little higher than on my road bike and used a shorter stem and found it to be much more comfortable than with the flat bar. It was also a world away from how the bike originally was with drop bars. I picked up about 3mph and have multiple positions on the bar which helps with hand/upper body fatigue. The drop position is great for headwinds, I have the hoods for general use and the bar tops to rest/stretch my back on.
Tzvia- rollin' slow...
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