That’s not a plot hole, that's just a thing that happened in the movie.
Same. But you have to admit, most Muppets would not be very useful in a survival situation. And the ones who would be useful would probably not be very trustworthy.
My mother called me Oscar the Grouch because I was not a morning person, even as a young child.
And I think it doesn’t matter whether this was the toddler’s mind protecting him in his despair via imaginary bear friend, or a real bear friend protecting the little boy. The end result is that a three-year-old child is alive and safe. I’m perfectly willing to settle for this.