Apparently Kling was against using "they" instead of "he". While I do agree that it's wrong and gender neutral terms should be used, I wouldn't "cancel" the guy over it. Afaik they are using gender neutral terms now.

The other stuff about Kling mentioned at the bottom of your link is worrying though. It's a shame a project as important and necessary as Ladybird was created by a person like him :(