I believe some if the confusion about hell is because of the various different descriptions of it.
The bottomless pit is one of different locations in hell there are others such as the outer darkness.
One of the things I noticed about life is how often chemical and physics laws seem to support theological ones.
For instance the chemical law of like attracts like. How water and oil do not mix.
The people in heaven lived a life of love, prayer, self sacrifice, purity, and truth. No wonder they are attracted to and end up in heaven.
Those in hell abandoned god in their lives to pursue hate, unbelief, money, lust, and self. They rejected god in their life and at death.
By choosing hell and choosing to reject god they choose an existence absent from god and with like minded folks namely demons. Hell was created for the bad angels
Not man. It is satans plan to deprive human souls of god and keep them in hell for eternity as a type of booty.
If hell is so bad the person you should blame is satan.
Lastly though, we are debating things we do not fully understand and cannot fully understand with our fallen human intellect.
I think jesus says it best when comparing hell to Gehenna, the trash dump Outside of the holy city.
Jesus came to give us a provided for expected death. This was our cleansing from sin by his blood. Human and demonic agency has striven to deprive souls of this great blessing so as to make the sacrifice of the only son of god moot.
God will step in soon and rid our world of these heaven depriving agencies and re create the earth to a pre fall state.