This.
It’s like roaches. There are only two kinds of houses. Those where the owners know they have roaches, and those where the owners don’t know they have roaches. Roachless houses simply don’t exist.
I will happily boycott local businesses of which I disapprove. And will tell the staff so. Being careful to not blame the staff for the owner’s folly.
But boycotting a Fortune 500 is simply hurting yourself for zero impact. You’re a gnat committing suicide to stop a freight train. Why bother; train don’t care.