I understand, and empathize with your situation havregryn! Maybe to give perspective, and a feeling that it could be worse, I would KILL to only have external noise in my current situation... I do have some, but internal noise drives you to the point of insanity rage, never having any peace.
My nightmare currently, is I live in a 6-plex, sharing a long wall with a neighbor, an end wall with another, and all three garages on the opposite end wall; think three sides of a rectangle. One neighbor has CRAZY OCD, and will loudly slam her $50,000 sedan doors as if they are barn doors, to make sure they are closed many, many times in a row. On top of this, she will lock/unlock this same vehicle upwards of 15-20 times, with the annoying horn toot for each time. On top, top of this, she will close the garage door, re-open it 4 or five times, still locking/check-locking the damn doors!!! Great too, she will remote start the car in the winter, and I get to 'enjoy' the rumble of it idling for 30 minutes. Mind you, all of this is less than 2 meters from where I sit in my living room!
The other neighbor only knows how to loudly slam doors/cupboards/cabinets/drawers/washer lid... And she does this every half hour from 6:30am, till 9pm, and at times 2-3am. You can literally set your watch by it, and you wait in dread until the next round. I may be a bit noise sensitive, but I'm 100% sure when the cupboard doors bounce 4 times till still, every time along the wall, you are being an inconsiderate asshole. Makes it so I hate to even be in my own kitchen, or sit in my living room! I spoke to both politely about the issue - it continues still, with Dr. OCD I think doing it louder, being super passive-aggressive. Even with loud white noise, and ear plugs, you can't rid the place of loud bangs/thuds/slams, and I'm freaking over it, especially at the high rent price I pay. I try to set the example, and it must be nice for them to live next to a nearly silent ghost. God I can't wait to get out of here.
Not to minimize your situation at all, but having outside noise is one thing, having no peace at all INSIDE your home is a hell, I wish on no one. I do hope you get your situation sorted-out, and I understand just how detrimental noise is the enjoyment of ones life. Good luck!