Something is probably screwy with your segments - it's listing 300 watts for the Mulholland DESCENT, which I doubt you're actually doing unless you're going up, but your speed is 29mph. So some of your segments are probably screwy, but a 190watt average actually sounds about right for overall.

I've done most of the climbs on your route, and those are legit mountain climbs. A 14.5 mph overall speed on that terrain is actually very respectable. When I'm averaging 15mph for the same 5000ish feet of climbing on the same roads you're doing, I can pull a 21mph solo average for the 40ish miles from Santa Monica to Trancas INCLUDING stops for lights on the PCH, out to Trancas, which still has a good 1000ft of climbing en route. Which means I'm closer to 22-23 the entire way - that's fast enough to past most riders on the PCH and even catch some of the road racing pacelines (if I tag onto a fast paceline, I'll find myself doing 24 for a similar effort with the draft.)