This sounds like normal dog behavior to me.
We used a shock collar on our dog...but he’s a 90 lb Pit Bull
The squirt bottle thing worked better then the shock collar. All we had to do is pick up the bottle and his bahavior changed. Until he realized he could drink the water shot at him....
Put the dog up during meals, or at least give it a raw hide or something to chew. They can smell the goodies, so of course they want some too.
Put the trash where the dog can’t get into it....it’s a dog...they like to put their noses in all the wrong places.
Eh, yes and no. I’ve had dogs that were perfect companions, that didn’t destroy stuff the moment you turned your back. My current pup knows when we’re no longer looking and does whatever mischief he’s into until we’re about to turn around or come back around the corner. That makes squirt-gun-training impossible.