God forbid we take climate change seriously. So far we are ignoring it. I hope she is successful in getting in to the top of the agenda where it belongs.
Hyperbolic rhetoric like this is part of what makes people not take it seriously.
No, what makes people not take it seriously is a coordinated misinformation campaign funded by fossil fuel interests and their conservative allies which helps people who don't want to make any changes or compromises to their lifestyle tell themselves it's ok for them to do so.
You can't point to any way that AOC's actions have made things *harder* for climate change action. Republicans are going to oppose no matter what, most are elderly and DGAF. The rest can be outvoted given time and strength on the Democratic side.