LA also has about 3 million more residents than just about any other fanbase. It's all relative. Your team SHOULD be selling out every game, just based on sheer numbers.
Only because of geography, the fact that LA is the largest city in the US in land area.
Within the actual downtown and original city limits, about the same geographic area as most large cities, LA has very few people compared to other large cities. Most of the residence reside in the San Fernando valley which consist of former cities/communities of: Arleta, Balboa Park, Canoga Park, Chatsworth, Encino, Granada Hills, Balboa Highlands, Hansen Hills, Knollwood, Lake View Terrace, Lake Balboa, La Tuna Canyon, Rancho La Tuna Canyon, Mission Hills, North Hills, North Hollywood, NoHo Arts District, Northridge, Pacoima, Panorama City, Porter Ranch, Reseda, Reseda Ranch, Shadow Hills, Stonehurst, Sherman Oaks, Sherman Village, Studio City, Colfax Meadows, Silver Triangle, Sun Valley, Sunland, Sylmar, Olive View, Kagel Canyon, Tarzana, Melody Acres, Toluca Lake, Toluca Woods, West Toluca, Tujunga, Valley Village, Van Nuys, Valley Glen, Cameron Woods, Ventura Business District, Warner Center, West Hills, Winnetka, and Woodland Hills.
The commute from the San Fernando Valley to downtown is not a pleasant one.