I'd say that by mere rationalization, the probability of nothingness after death is infinitely more high than that of reincarnation, heaven, hell, or whatever religious concept we have inherited in our societies.
Those who claim that us humans have a soul have failed to back up their assumption and produce any kind of proof beyond empty and meaningless words - it is a human concept, an all too human concept...
That said - if such a process would exist, then it would be extremely harsh for one to be human again: the lower one goes into the list of animals with consciousness and pain receptors, the better one will be: it is better to be a slug than a human, and better to be a plant than a slug, but ultimately, it is better to never be - so rock gang or wooden plank gang it is, then.
There's an interesting dichotomy here. A conflict of interest between two seemingly-separate consciousnesses. Your soul, able to see the reason for suffering and life won't hesitate to return to a human incarnation if it deems it necessary.
I personally think that before such assesment can be made, we'd have to establish what a soul is and that it has capacity for rationality and desire: if the soul wouldn't hesitate to return to X state, it means it must have a desire between one things and others, which doesn't seem to be the case, provided we don't even know what a soul is in the first place, nor if it truly exists beyond spiritual and metaphysical talk tainted with a bit of religious dogma.
We really don't even know how consciousness works yet, and probably will never do... So when people talk about souls and reincarnation as a given, it makes me kind of wary...
Why does my soul want to go through it again? I also hate the fact that my soul chose this hard life for itself. I hate the fact that my soul chose a life where I have neurodivergence in a neurotypical world.
I'm really sorry - you didn't chose any of this horrible stuff to happen to you... One doesn't pick suffering, be it through oneself or one's "soul", life is just filled with suffering even though most don't notice it until it's their turn to suffer: there doesn't seem to be any higher reason for it: no 'spiritual growth' and 'personal evolution' can justify the suffering that every living being suffers on this world alone. Suffering is inherent to life - pleasure and comfort can be obtained, but life's standard biological mechanism is pain: the mere act of hunger proves this notion, I think.
Many hugs to you all.