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.
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.