This one took a bit to get it's groove. The intro was choppy editing, mugs by the actors, clips of relationships that aren't followed up on and then tragedy followed by stupid jump scares. A year later, it's some poor character development and poor dialogue.
And then they enter the cave.
It takes a minute for things to warm up, but once it gets intense, it never lets up. Like Hereditary, there are different kinds of horror going on here-- disaster, betrayal, claustrophobia, monsters, and basic survival. You never know what horrible thing will happen next, but once it begins it doesn't let up. This was tension, fear, horror, grotesque, and hurt all wrapped up on one.
If you are looking for an aerobic workout while sitting on our couch, this is the one for you.