As difficult as this is in understanding (even to me) God’s Spirit (not Christ) will be with them in Hell.
And the salvation from the fate of sin was pre-planned before the creation of the world. It is the fate of man to die (cease to exist) unless he is saved from death by belief in the power of Jesus sacrifice and resurrection.
The saved go on to eternal life. The lost die, never to be seen or heard from again. They are simply gone.
You are forgetting judgment. And if in judgment God destroys them, is that, by your definition, very loving?