Have you ever created a self-insert character?

[Froge]

Not self-inserts, but definitely people who only explain things.

In my first and second novels, things were a little too cryptic, so I literally had to insert a guy at the end whose sole purpose is to explain everything.

In my third novel, I tried to be a bit more subtle and created "guide" characters who accompanied the main characters so that they knew what was going on. But then I decided to put a guy to explain everything at the end again.

In my NaNo novel, I had a guy who was not only a guide, but he explained everything. All the time.

So yeah.