There are two possibilities:
1. He's gone nuts
2. Secret signals that have hidden meanings
The photos, ever since he got forced out, have had a consistent theme of nature, him standing in a place, and cryptic comments. If he's gone nuts or is having an existential crisis, the meaning is evident. He's isolated, lost, and pondering how he got into this mess. If it's a message, I don't think the photos will reveal themselves, unless you have the key. It's like this:
Supposedly, this symbol is a pedo symbol for "little boy lover." Once you know it, you know it when you see it. If you don't know the meaning, you can see the symbol a thousand times and it won't reveal anything.