Like she wouldn't have gone behind her parents back for internet access...
Maybe, it's always possible.
Now, you are a just making stuff up.
Bollocks. This happens all the time -- parents spend all their time and energy on their kid(s), and when the kid(s) leave, the parents have absolutely nothing left.
Why? Because the parents never gave themselves time to be alone together, or even individually. They spend their days working, and then spend their nights running the kids to this practice, and then that practice, and yadda yadda. If you don't make time for your significant other for years upon years, then you will ultimately not even know who they are anymore.
EVERY person changes, especially over the span of a decade or more. If you don't spend time with that person on a consistent and regular basis, you and they will both simply grow apart. Not out of spite, not out of hate or anger, but out of the simple workings of humanity (as you so eloquently put it)
And if doing this had lead to you resenting your mother, entering a deep state of depression, eventually turning to substance abuse, and ultimately killing yourself, assholes on the internet could enjoy whatever satisfaction they get out of calling your mother a bad parent.
It never would, because my mom doesn't just slam me in a room and ignore me for years if she considers me bad. Bad parents might, but good parents STILL MAKE TIME for their kids, even when they misbehave. I was grounded quite a bit when I was younger, but that doesn't mean I was expected (or even allowed) to sit in my room and hole myself up -- real life doesn't allow you to do that either.
And substance abuse comes from parents who either A: over-shelter their kids (Alchohol doesn't exist, you can never see, hear, touch, taste or talk about it evAR!) or B: over-indulge their kids (sure, man, you're my bud -- have an entire glass, it doesn't matter if you're 8!) I was allowed to taste beer as young as five -- you know what? I hated it, because it tasted nasty. I still had a taste anyway, more than a few times, because mom and dad occasionally had some with their dinner too. By the time I was a teenager and was subject to "beer parties", I already knew that beer just really wasn't that big of a deal. Why would I want to drink so much as to get sick? It didn't really taste THAT good...
And good parents according to the people in this thread? You'd be wrong if you said I'm the only person here blaming the parents. You can keep the rest of the psychobabble, because that's all it is.
The examples you gave are nothing more than excuses for parents; parenting and the skills therein have gone SO FAR downhill over the last 10 years that it's just ridiculous. Parents are so worried about making their kid happy and being their "friend" and wanting to be "liked" that they entirely shoot themselves in the foot. You are not your kid's "friend"; worrying about being "liked" is lke worrying that you'll not get asked to the prom. If you be a good parent, your kid will still hate you occasionally. It's ok, that's the way shit happens. But if you've done a truly good job, they can still hate you without jumping off the deep-end by killing or harming themselves or others.
If your kid is SO screwed up that they are hurting themselves or others, then you really have done a bad job, let's re-emphasize: A VERY bad job at being a parent. Period.