"Individual action" is a euphemism for changing your lifestyle in the slightest, even if imposed from outside through tariffs/taxes or other regulation. What people want is their exact same lifestyle, except eveything bad has been spraypainted green. It's understandable, I want my wishes to turn things into gold.
Action against companies is an extension of action against consumption, not an alternative.
I'd say many are ready for individual action but are discouraged on a daily basis especially by
- hypocritical politicians and environmentalists traveling the world on first class/private jets
- negativity like yours and the one I originally answered
- misinformation/information overload/infighting: whatever good someone tries to do someone will pop up to explain why it is bad: nuclear, organic, frugality, you name it, someone will magically pop up to tell you how worthless exactly your contribution is.
I say: almost every effort is worthwhile as long as one doesn't actively destroy. At least spread enthusiasm and knowledge.
Action against companies is an extension of action against consumption, not an alternative.