I have complex feelings regarding Greta.
Sure, she's an inspiration and she's courageous and selfless and her heart is in the right place.
Other people were on this boat who were also at risk, many other atrocities have occurred during this war and the one in Ukraine in which Greta wasn't present. Her involvement in this one is not why it's significant, and the people present at all the others were no less courageous than Greta.
In fact, there's a lot of other people being a lot more courageous receiving a lot less recognition.
Additionally, in some cases the recognition Greta receives is counter-productive. I mean, putting a world famous influencer on a humanitarian mission to a place where the aggressors want as little attention as possible isn't really a sound strategy.
All that aside, I have two main concerns:
One is that Greta is the hero of the leftists, but she's unable to engage with the right - the people who really need to alter their behavior. To them she's just an insufferable child who makes them feel guilty - that's not how you reach people and propagate change.
Second is that, I don't think she's used her influence very well. During the US campaign she was pushing the "both sides bad" narrative.
Edit: I'm happy to wear the drive-by downvotes, but I had hoped for some more compelling rebuttals - 150 downvotes deep and the best we've received is that Kamala was bad.