Yes, when dealing with things in our own lives it's usually best to go with "at your own feet", not mater who the actors are, since the only person whose actions you can change are your own.
But as far as climate goes, we, the individuals (who happen to not be rich at the moment) have no power to change anything. So taking personal responsibility will change nothing.
Well, actually, people taking personal responsibility for the climate have possibly made it worse by redirecting the attention to themselves.
Consumers are not just going to pull on their big boy pants and stop consuming, and we'll all live happily in a recovered ecosystem eating organic corn by candlelight. It has to be regulation on industry, and improvements to production (eg ditch coal power generation). Stop it where it matters, where impacts have the scale to actually matter.
I've been riding my bike to work this whole damn time! I think we're going to have to be a bit more ambitious.
If the serious consideration for those posturing starts and ends with consumption, then the consistent approach would be to oppose immigration. They do not, because it was never the point. Self-righteously indignation and signaling is.
Saying this with the awareness that both right-wing detractors and far-leftists like to target consumers/consumption, as for the latter it dovetails with their anti-Capitalism. Just look at the fusion energy thread from the other day, people are voicing concern that carbon-neutral and cheaper energy would lead to people buying more things. Westerners are struggling to get by, with purchasing power stagnating for years, and yet it's being projected they're practically drowning in useless stuff compared to their grandparents.