True 'creepy', but really - just doesn't quite add up!

Rating: 4/10 (8 May 2019)

I'll try not to plot spoil, rather than just observing, that in the end, much of this just doesn't add up as either remotely plausible to your necessary entrance with 'suspension of disbelief': there are just so many why is that, why should that occur? Indeed, if you go along with the premise, why the blinking heck would a nether world demon have to go through such a convoluted, improbable, palaver to get to ... up a ladder into a tree-house of all places?!
With so few followers that they ALL comfortably fit into ..
With all such, ah, beyond, demonic and the likes 'powers'?!
Come on!
And why 'Peter'? What was so demonically alluring about him ...?
Oh, yeah: it's in the title - innit.
And as for some of the key conceits that also just don't add up / would / could not occur like that ... (where was (Grand) 'Mum' put? Oh, yeah, didn't know that until ...!)
To the point that, yes, despite Toni Collete does indeed emote across her bewilderment terror pretty well .. but as to her latter 'upper' peripatetics .. why? To what reason to, well, have to ..
Well, I could go on to the point that a story fairly well set up just seems like lazily tossed away in the end:
pity, because the opening shot(s) are intriguing - but even then, I was expecting some form of relevancy to this aspect of the home 'like' disturbed theme .. but in the end, well, it even finishes outside in a .. ah, I've mentioned that!
Why it's rated so highly creepy is beyond me - perhaps I have just far too many far superior efforts in my head ...(still try and beat 'Excorcist'!)
Although, true, creepy and effective in the set up, but ultimately, utter con on its audience.