A compelling story - but with just far too many flaws

Rating: 2/10 (9 April 2018)

This movie has so many inconsistencies I dont even know where to begin. If you havent seen it yet, please be mindful that I will list now various spoilers, purely for the sake of my argument - that the whole film is one big flaw.
Starting with the positive aspects: a very compelling story that is unlike many other suspense movies. An unknown evil force is attracted solely by noise made by any creature, only to kill them immediately once found. I love the cast, dear Jim as one of my favourite office-characters and Emily Blunt whom I would marry tomorrow.
So far for the positives. I couldnt help but constantly wonder why so many users and critics dont seem to be bothered by some serious flaws throughout the enitre movie:

if the creatures are attracted by noise, why dont they constanly show up in hundreds? The one evil that is around the farm makes A LOT of noise throughout the entire story and should attract his own race constantly. And as we learn from the last scene, there are hundred other aliens around the farm!
As clumsily written on a white board (so that even the simple cinema goer understands) there seems to be no weapon against the evils. There is even a newspaper article with the very same headline. But then, sweet Emily Blunt discovers that you can just blast the alien's head away with a simple shotgun - hmmm... why didnt anyone think of that wonderweapon before?
The very little boy at the beginning of the movie seems to run around entirely unsupervised until he provokes his own destiny. Hell, what kind of parents are Emily and Jim if they constantly must fear of the little one creating serious noise - but letting him off leash in every single scene.
Why is dad throwing away his axe when confronting the beast? He could have fought until the bitter end as per his original plan.
When mum & dad are in their hide-out Emily Blunt whispers "it worked...". What worked? Hiding under a slim matress that doesnt cancel any noise? We pretty soon will find out how well that worked.
The oldest daughter has the magical weapon in her hand (or at her ear). But just before making the brilliant connection how to use hear hearing aid as the kryptonite against the aliens, she even had switched off the device. So, how did she make the sudden conntection that the hearing device would be the magic weapon? Only because we see the (again clumsily introduced) written question on the white board "what is the secret weapon?"?
When the kids are sitting in the truck, the younger brother releases the hand brake and the car starts slowly moving backwards. In the next scene we see the truck arriving spot on at the house entry - but now driving forward. When/how/why did the car make the magical 180-degree turn?

I probably could continue ranting along but I guess I might my point clear. An actually really interesting story facing a huge cinematic challenge that no word can be spoken. Someboday from the filming crew should have watched the final cut before releasing it to the public.