Why Is This Planet So Fragile?

In a distant planet, a few thousand light years away.

This planet was exceptionally strange. And was alsmot a hundred tunes larger than earth in size. Its sky was entirely different from any other normal planet and the gravitational force within this planet was about ten times that of earth. Also with its slightly toxic air that could poison a normal human being after inhaling for a while. It was not really habitable to any normal human nor animal. 

The ground erupted with hot steam and its mountains poured hot lava from its tip, glowing the surrounding a dim red color. 

The environment was very gloom as though the plant was in the verge if dying. Strangely, there were numerous beings luliving in this planet, forming some sort of civilization. It was obvious that they weren't ordinary beings. 

A large volcano sat at the center of this planet. It's peak almost reaching the atmosphere of the planet.