I can't even read the story in question because the link just goes back to the main page, but just from the comments and similar things I've read, I think I know enough about this general style of story to make the observation that the 'heaping every possible misery upon all at once' approach doesn't necessarily always help the readers sympathize with your character. If you've already signaled that only horrible, horrible things are going to happen throughout the story, they already know not to hope for or expect anything more and thus don't allow themselves become emotionally involved.
It can even get to the point where it's even almost funny in a morbid way just seeing what horrible over-the-top trauma the author is going to think of to inflict on their characters next. (Read up on the development of the game called Drankengard 3 sometime...it's like the Aristocrats joke on infinite loop and it was actually hilarious for awhile watching the writers try to make every new character bio top the others in a never ending stream of lol child murder, lol rape, lol torture, lol torturerapemurder, and that was downright tame compared to the translations of the manga people were posting...)
To me it's much more effective giving readers a reason to care about your characters as people before you start piling tragedies on them, and even then it might be a good idea to rein it in a little so that they don't just become a mannequin that exists to showcase all the amazing styles of misery their author has lovingly designed...but of course that's just my opinion, YMMV and all standard disclaimers.