What about a CX-30 Turbo?
Speaking as someone with about as much LA freeway experience as you can get without being an Angeleno or truck driver—and who's spent many of those miles in a 5,000lb, 200hp, 4-speed automatic, 1998 Montero—it's a LOT easier with a turbo.
CX-30 MSRP starts $7k below the CX-50. Same powertrain. Maybe 400-500lbs lighter. #zoomzoombaby
Now, also speaking as someone who's spent the last 20 years playing with turbocharged Mitsubishis and rally cars, the CX-50 Turbo is a very well-sorted machine. The turbo trim, throttle, and transmission tuning is the better than anything else I've driven under $50k. From a slow roll around a corner, you can plant your right foot and it will pull strongly through at least third gear—at which point you're a blink away from a triple-digit, felony speeding ticket.
PS: What about the EV version? Unlikely as quick, but maybe you get some stickers and use the CHOV?
Good luck. It's always open season on the LA freeway system.