Wow. It works for him and it works for me. I'm forever grateful for what he's done and I feel this bashing is totally undeserved. Kitty and Calibre are two of my favorite software thingies ever.
And I specifically avoid all software from both of those people precisely because of their attitudes towards others.
I'm not asking anyone else to do the same, I know it's a wildly unpopular opinion and people will attack me for it.
But boycotts in general wouldn't exist if everyone could separate the art from the artist.
I agree that he could do a lot better with controlling his emotions. Me and him are on the opposite ends of the tmux debate for example. But I understand his point, he's trying to solve the same problems that tmux solves, with a very different way.
The problem is that Kitty isn't there yet (I wish it was) and his outburst on the topic are quite damaging to his goals.
When you've met and worked with people in real live that are like that, you can just visualize them and have a laugh at their outbursts.
I'm still team Calibre and Kitty any day and tremendously thankful for what he's doing.