Is there a term for phobia of companies?

Yes, ergophobia, ergasiophobia or ponophobia are all terms that mean that.

Why are you looking at large corporations? There are a lot of smaller or mid-sized businesses that do fair trade, even in California. I do not know where you are looking for employment, but small agriculture companies in California always need workers. Right now Blue Diamond and Gallo Wineries need people to work maintenance on their equipment. If you can do welding, tractor repair shops need welders all the time. Some small manufacturing companies make machinery for specific agriculture needs. There are cooperative companies that need equipment repair, maintenance, and welding.. And with welding or maintenance and equipment repair, one can go sideways. Yosemite National Park - the hotel concession company that operates the hotels and restaurants in Yosemite need maintenance and equipment repair. If you can fix diesel engines, truck and bus repair is always needed. Start looking at smaller or mid-sized companies instead of the huge corporations and find out how nuts and bolts make the world go aaround

maybe you should try it to lose your fear

Self Employment . Very advantageous if you are the best employee at work .

If you got fired you might not want to hire yourself .