honestly i had a long shitty rant here about the tropes i was expecting from the abhorrent combination of "S-rank" "healing life" "monsters" in the title but it's honestly not the worst thing i've read.
it's not the slightest bit intriguing either. the big bad is evil lab men who torture children either because they're evil or because of some vague notion of "greater good" which will be discarded once the author decides they're plainly evil, the mc clearly bulldozes everything until the big bad creates an upgraded version of him and they have a big anime battle or something. if this is attempting to be a slow life story, they muddied the waters with the looming big bad and the fact that the MC has no personality besides being super ultra strong, so you look to the supporting cast for some semblance of a reason to continue reading
naturally, there are gates, hunters, hunter associations as you'd expect. the story greatly relies on the concept of chimera hunters, and from the writing so far i don't trust them to explore any more ideas to separate this story from the amalgam of stories it's copying from, nor to explore the already less-than-novel concept they're using (if that's even possible, given that there's not much to explore)