Yeah this went downhill real fast. I thought the author was aiming for a calm, collected, and lazy MC, but turned 180 to a cry baby, naive, and proactive MC at this point? For what? I can see that the author wanted a progress of the MC's power (or lack of awareness of more powerful beings), but why did it this way though. I can't see this as a character growth, this is a character decline, if not a totally rewritten character.
P.S. I haven't read the novel, so I don't know how it goes there, or if there'll be reason why MC suddenly changed.