"Respawning" whenever one dies because of some quantum mechanics BS sounds disturbing or horrifying (depending on how miserable one's life is). If it's true, the only true way out of a hellish life would be when there's no chance of survival from a death - otherwise one would keep waking up in alternate timelines where one survived any potentially fatal event. Which would mean living until one is ridiculously old and decrepit.
But in order for that to be a thing, consciousness has to be some magical quantum woo that could magically jump across spacetime. Also, death is a process, not a one-time event, so if there are alternate timelines where one is dying, one would be dying in all alternate timelines too.
Recurrence is a cosmic horror. If true, it means the universe eventually collapses in a Big Crunch, bounces back in a Big Bang, and time resets. Which would mean that when one passes away, the next thing they know, they'd be back in the womb to live the same life - over and over and over again. All the suffering and evil of the universe would repeat endlessly, the same crapshow over and over and over.
But in order for recurrence to happen, the universe has to be a closed system - nothing getting in or out. If it's not closed, time can't repeat perfectly. The universe also has to be able to contract - current evidence shows it's expanding forever. And even if there's a Big Crunch, time may not reset anyway. And in order for one to experience recurrence, there would have to be no afterlife taking one beyond spacetime.
And speaking of afterlife, reincarnation is another cosmic horror. Given enough lives - and especially if any reincarnation is not bound by time - anything horrible one can think of that can happen will happen: being tortured to death, suffering insanity with horrifying hallucinations, rotting from an agonizing disease, having one's home village raided and burned to the ground by an invading army, being an African crammed like a sardine in a slave ship bound for the South... And with reincarnation, one could be born a genocidal dictator, someone like CWC, or someone like Nick Bate. And if reincarnation isn't limited to being human over and over, one could be reborn as an animal that lives a terrible existence, like a male anglerfish. And of course there's the fact that reincarnation would mean losing one's personality and loved ones over and over and over - a different being in every life after life.
(I've heard the disturbing conspiracy theory that there's these evil "energy vampires" who use the tunnel and creepy "being of light" of near death experiences to lure spirits leaving Earth into a trap of reincarnating back on Earth. The theory goes that the "energy vampires" feed off of the endless misery and suffering on Earth.)
Reincarnation is challenged though. "Past life memories" could be cobbled together from stuff from one's life. If there's an afterlife, the memories of spirits who have passed on could be tapped into, believing they are one's own. And of course, the field of "reincarnation research" is full of fraud and delusion.
And of course, there's "traditional" hell: burning in unending agony for a literal infinite amount of time. For that kind of hell to be real, any deity presiding over it would be unforgiving and evil - certainly not an embodiment of love.