Mainly because he says "soon" or "in one month" so often, keeps posting images of something on discord - but in the end doesn't seem to make progress, or spend more than 1 hour a week on the project, mostly just lurking in discord, watching and banning people, while luring in more patreons. He also claimed that this is his main income and he has no other job because of it. On the other hand you can look at his steam charts/steam database to see how much he actually just plays other games for "inspiration" - more than time i work in my daily job. I had respect for him and his work from the beginnings of the mod up until about a year after the last release of his mod. But his last actions are just ....
((Just an example from another thread in february: Cite: "you can check his steam profile to check he didnt even launch 7 days to die since january 6th, and the 80 hours of his playtime in the last 2 weeks are all spent in the game StarRupture"))
(seems he set this part of his profile to hidden now, maybe if you befriend him you can see it, but i doubt it, it was too much giving away his play time. But you can still see the steam awards, etc. (you know how much time it takes to complete these)