Just because they're hypocrites doesn't mean they're wrong. Carpooling or using public transportation and reducing meat intake (especially beef) are empirically direct actions that reduce emissions. There's obviously a lot more power structures could do like stop using taxpayer money to subsidize oil and meat company profits, but that won't stop me from doing what I can with my own two hands.

Refusing to engage in good action because you don't like the messenger is teenage angst behavior, not rational decision making.