From the article;
I think that this debacle could've been avoided if Plex had just taken a more careful approach with its app overhaul.
So, they separated out their photo app from the rest of it, and people got mad because they did a bad job of it. I don't see the problem. There's a lot of reasons to be mad at Plex, but them taking their photos service and putting it into a different app isn't plex trying to make things shittier for money. It's just the regular development required to keep things running well. Except for how badly they did it, apparently.
I don't use Plex. Never did. But I just don't see separating photos from the main app as anything worse than a side-grade. The article mentions how they didn't have a photo app for the TV users, which okay, that's worth complaining about, but if they had done that part right it would actually be less effort if all you wanted to do was display photos on your TV.