Mental illness is pretty tricky and if you don't suffer from it personally, it's exceptionally hard to understand just how deeply it affects people, even to the point of having death feel like a far better option than continuing to live. Even worse, is when people that don't get it, aren't really interested in getting it and would rather blame "Culture", "Kids these days", or even worse call them ungrateful for what they have than actually sit down and make a legitimate effort to try to understand where someone is coming from.
Suicide's a pretty personal topic for me, as I've suffered from depression and other contributing issues (ADHD, tourettes, anxiety) my entire life. When I was about 14 I was overwhelmed with school, constant harassment and assault (I hate the term 'bullying', call things what they are) at school, and I literally saw no way out. Luckily at the time I was an idiot and my method of trying to kill myself was "Down every pill I could find and a bunch of listerine to try to poison myself", and somehow I didn't destroy my liver in the process. There's various other times I've flirted with trying to kill myself but realistically wasn't serious enough about it to go through but did things like trying to drown myself or suffocate in a bag or such through my teens and early adulthood. I definitely still think about it from time to time, and on rare occasions have self-harmed but generally speaking I'm a lot more stable... But there's only so much a stable job, healthy habits and diet, exercise, an open mind, therapy, medication, and hobbies can do to try to "fix" something broken with your brain.
My best friend came home on christmas day a couple years ago to find her roommate and friend had hung herself a couple days earlier. This came after another suicide attempt a couple weeks earlier that she didn't realize at the time was a suicide attempt (Took a bunch of sleeping pills, ended up getting hospitalized). She's talked to me a lot about it in bits and pieces and actually went into a lot of detail about it with me this last weekend and I can tell it's been on her mind a lot lately. She fell short of a clinical diagnosis of PTSD but definitely had full blown flashbacks randomly triggering from anything from seeing a belt (which her friend hung herself with), to a dimly lit room, to a random shadow for a good 8-10 months afterwards. My best friend herself suffers from depression and while I don't think she will kill herself at any point, the way her brain is wired is incompatible with modern living and will always struggle to get her basic needs met.
My father in law, pretty much the definition of a Fox News watching conservative "Suck it up!" 62 year old (whose shitty bootstrap mentality attitudes and general lack of understanding for my wife's issues during childhood has racked up quite a lot of therapy bills for her), has tried killing himself a couple times with pills and my wife spent 3 months during and after a hospitalization helping keep their family business together and keep an eye on him when my mother in law needed to work to keep him away from pills and the gun cabinet. I only mention his political beliefs due to a comment in this thread that seemed to want to blame things on liberalism which I found to be particularly dense and objectionable, almost to imply that being miserable to the point of legitimately wanting to die to the point of overriding the survival instinct is a matter of attitude or personal/political beliefs.
My girlfriend (for context as many of you know I'm married - I'm also poly) has seen her best friend cut herself down to the bone, and while she's doing a lot better nowadays, there's only so much you can do for borderline personality disorder and she more or less expects her to kill herself at some point.
I don't have a very kind view of people that see these sorts of things as a matter of poor attitude, culture, or personal choice. These things definitely can be contributing factors, but anybody that sees these are core reasons is willfully ignorant and I frankly find it insulting given the sort of shit I've gone through as well as the stories I've heard from others important to me in my life.