This attitude is exactly the problem. You twist it around to pin the blame on green activists somehow not doing enough in their personal lives, and no matter what they do, it's never enough. If he had given up his car, you'd ask when he'll give up meat. If he'd given up meat you'd ask when he'll put solar panels on his house, or whatever other excuse you can come up with to feel superior and justify doing nothing.

These things only work if everyone does them. If we want people to give up their cars we need massive investment in electrified public transit. Without that it is impossible for most people to survive without cars. A few people who have the freedom and the will to suffer under public transit choosing to give up their cars will do nothing to stop climate change.