Those companies pollute to produce goods and services that individuals buy.
What does holding corporations accountable look like if not refusing to give them our money while advocating for regulation?
Individual change is changing society.
Throwing your hands in the air, doing nothing to change your destructive habits and just saying "but corporations" isn't gonna help anything.
You can easily be vegan while advocating for other change like less coal.
If the world adopted a plant-based diet we would reduce global agricultural land use from 4 to 1 billion hectares