Supply chain is complicated.
TLDR is that everything is all fucked up.
Longer TLDR is that basically, the only people who want it fixed happens to be the consumer. California makes money no matter what charging fees for shipping stuff through their ports. The ports charge fees for shipping containers sitting on the docks. The trucking mega-corps get to charge more fees because space is limited. The dock workers get paid no matter what. in fact, this is good for them, because they have as much work as they want ATM.
This is benefitting everybody in the shipping industry, and fucking everyone outside of it.
The one exception is independant truckers, and those are basically gone. Between covid and California's insane regulations, independent truck drivers realized that because they were literally waiting 10+ hours in line at the docks, and even then couldn't always get their cargo container, between fees, buisiness expenses, and the fact they were paid by either the mile, or delivery, not by hour, sometimes they were making less then minimum wage. Some even lost money.
They, understandably, had a bitch fit, and said "Fuck this."
Independant truckers make up a huge portion of the trucking industry. The only people who really are picking shit up from california now are the mega corp truckers, who are paid by the hour and don't give a single shit, and the independent truck drivers too stupid to realize that they are being screwed.
A pretty big portion of the independent truckers retired.
And now we can't get more truckers. Partly because DOT says truckers have to be over 21, and partly because the shipping industry isn't willing to pay drivers enough to ship, because this situation isn't losing them money.