While I don't like her, its not like she was lying. He clearly had a history of depression and you don't have to know the guy to realize that. You simply have to listen to his songs.
For years when friends and I would bring up Soundgarden and the convo would eventually start going over their lyrical content, I would say the same thing.....a miracle he didn't off himself in 1994. Superunknown is an incredibly dark album and he would have to be in a very disturbed and lonely place to come up with lyrics such as Fell on Black Days, Mailman, Fresh Tendrils, 4th of July, Superunknown, etc.
Listen to the song Worried Moon from his last solo album and his approaching suicide isn't as much of a surprise.
He didn't have a large dose and it wouldn't take that long for the dose to start kicking in anyways. A typical benzo addict will usually place the ativan, xanax, klonopin, etc. under their tongue to get the drug coarsing through their veins quicker and get what Cornell would call "on and connected". If that's not good enough, they'll mainline it.
4 mg of Ativan is a low dose for an addict. Its verging on a 'maintenance' dose. 4 mg is simply going to make you drowsy.
There is no coverup. There is no conspiracy. As insanely talented as he was, it boils down to a very depressed guy with a history of alcohol and drug problems killing himself. I hate how certain media outlets and even some fans are trying to turn this into Cobain 2.0