If heaven (here and now) is fullness of life/spirit/joy, then hell must be emptiness.
Hell, like heaven, is a spectrum. A gradient.
The further you drift from your core being the more and more empty you become.
Free will allows us to draw near or drift away from that fullness.
Fate doesn’t identify individuals who will or won’t find that fullness.
Fate simply tells us that, in aggregate, many of us won’t.
Fate is not a determination of the individual (the choice is always our own).
Fate is simply a probabilistic truth about the nature of humans (en masse) to miss the life, joy, peace — fullness — that’s ever-present in every moment.