My presumption is that you live in the greater LA area . . .
In addition to the three stores Robert mentioned, you might want to check out
In Santa Ana, https://www.winex.com/default.php
In Santa Monica, http://wineexpo.com
In Signal Hill (Long Beach area): https://thewinecountry.com
In Costa Mesa, https://www.hitimewine.net
In LA, http://www.larchmontvillagewine.com
In West Hollywood, http://www.du-vin.net/index.php
In Manhattan Beach, http://www.manhattanfinewines.com
there is something else that may help you: how you buy wine.
I would recommend you find a wine retailer who has a truly knowledgable staff. Try to describe the type(s) of wines you like, and don’t like, and see what they recommend . . . then, go back – whether you liked the wine or not! – and tell the sales rep what you thought of the wine. The more they understand your tastes, the better their recommendations to you will be.
In an ideal world, of course, every store would have knowledgeable employees, but in a day where most wine is purchased at supermarkets, stores like BevMo, Cost Plus, Target, Sam’s Club and Costco – well, let’s just say you need to go to a real wine merchant.
Or, actually, several. I recommend that you buy no more than 66% of your wine from one retailer, and spread the rest around among a handful of other stores. The reasons for this are serious: 1) no one store can carry everything; 2) every store specializes in something different – one may (e.g.) focus on Italian wines, another on California, or wines from Down Under, etc., etc., etc. If you only frequent one store, you are limited to that store’s inventory.