He doesn’t like Voyager for good reason though; the app basically one-for-one copied what he had built for reddit but pointed it at Lemmy instead. If somebody took something I had developed and changed very little from the outside, I would be upset too.
I think he’s totally within reason to dislike what is essentially a ripoff of his intellectual property. That being said, I’d be surprised if he decides to make the developers have repercussions for following his design so closely.
I think the UI is still enough to get upset about, even if the structural changes underneath are very different.