Individual action matters a lot. Yes corporations are those that need to carry out the ultimate change. So the thing where corporations "blame" individuals for climate/pollution is bogus. But as consumers and as employees we have a strong impact on the environment and should advocate for that.
It even rings a bit hypocritical if subsequently you say support organizations that put the onus elsewhere.
Eat meat, but only meat that is sustainably raised. Depending on the size of your lawn, you probably can raise a couple meat or egg chickens on the natural flora/fauna in your yard and table scraps. There are CSAs that raise only pastured eggs/chicken/hogs/beef without fossil-based grain inputs.
Meat is healthy, but yes, it is fossil-intensive in the modern era. But it doesn't have to be. There are zero-fossil options.