Venerable Chongming isn't mentally ill, it's just too lonely.
Long-term imprisonment has made it incapable of normal communication with others as equals.
That might sound hard to understand, so let's put it another way.
Some people kneel for so long that they can no longer stand up.
The words don't match the intentions, but the logic is the same.
In reality, people who have knelt for a long time can return to normal if you engage them in normal exchanges for a prolonged period without specifically targeting or provoking them.
Venerable Chongming's "I'm amazing" syndrome can be treated the same way.
But where on earth would you find that many Longevity Realm people who are so idle they'd come to such a desolate place like Gan State, just to chat with this silly bird and endure its verbal pestering?
Chen Zhixing certainly couldn't manage it.
