What do you mean, "nowhere does it say that things get worse overall"? Do you need to get it explicitly spelled out for you to realize that the environment and ecosystems everywhere are under extreme stress (to say it mildly) and failing!?

Do you really believe, that the way humans are using resources and polluting everything, doesn't have any negative impact?

And why the hell would the GDP be ANY good measurement, since it does not include any environmental costs (if I don't need to correctly dispose of my trash and can burn it cheaper, I have an economic advantage in the way of less costs)?

And your OECD study: doesn't it specifically talk about economic impact if climate change measures ARE being implemented (especially emission reductions)? This of course makes sense, as this would imply massive investments in technologies and sectors. This source specifically does not make a case for climate change being not as bad as predicted or that it doesn't take place.

Looking at the current state of the world (especially ecosystems, which are extremely important for us), I really wonder how someone can make an argument, that it isn't as bad as it is made out to be. It is often way worse, as many things aren't really talked about in the open.