If you live in a western democracy your politicians are held very accountable to the opinion and will of the people who vote. They are not kings or inherited aristocracy, they do what the people want (roughly) or get voted out.
The people who vote by-and-large don't believe climate change is real, don't believe it is serious, or are not willing to tolerate the level of discomfort necessary to solve the problem.
At least in my country, politician's hands are completely utterly tied from fighting climate change, because if they do something serious enough to actually matter they will immediately be voted out of office and whatever they did rolled back.
If you live in a Western democracy your politicians are very accountable to media owners and corporate donors. Voters are a very long way down the influence list, because media owners and corporate donors have sophisticated and very expensive - but high ROI - ways to shape voter opinion.
Some are simple censorship - like X and FB throttling the reach of unwanted content and promoting the reach of the opposite.
Others appear believably organic.
The obvious ones are crude, but they still work on huge swathes of the population.
The first step to recovery is to accept that this is how the system really works, and the idea that voters pick leaders based on a rational consideration of their record and potential benefits is absolute fantasy.
That's mostly a feature of elections with single-member districts or other winner-take-all mechanisms. Every successful politician must have a wide coalition behind them, and marginal groups that could back either major candidate determine the winner.
Proportional elections have different dynamics, especially if elected candidates are determined by personal votes (and not by predetermined ranks on the party list). A successful politician mostly needs to find a niche and maintain their visibility and support within that niche.
Here in America we love to blame the politicians (they do indeed suck). All the while voter turnout is a complete joke. Perhaps this is actually helpful, because we are rife with various subcultures that openly celebrate ignorance, so, yeah. Blame the shitty politicians, speak not of the ignorant and unbothered masses.
To be fair, the US electoral system is designed to discourage or outright disenfranchise most voters:
* First-past-the-post, winner-take-all elections ensure that anyone who isn't living in a swing state/district may as well not bother.
* Heavy gerrymandering exacerbates this effect.
* Voter suppression tactics like attacking mail-in ballots and closing voting locations makes it more difficult for those people who still want to vote. Note that Voter ID laws are included in this because there still live today people who were denied birth certificates due to segregation-era hospitals refusing non-white mothers delivery care.
* Holding elections on non-holiday weekdays makes it harder for those living paycheck-to-paycheck and working hourly jobs, though this is blunted somewhat by states which allow early voting.
The people who vote by-and-large don't believe climate change is real, don't believe it is serious, or are not willing to tolerate the level of discomfort necessary to solve the problem.
At least in my country, politician's hands are completely utterly tied from fighting climate change, because if they do something serious enough to actually matter they will immediately be voted out of office and whatever they did rolled back.