Thankfully it hasn't caught on in most countries. I did heard about one Pacific island where there was a suicide epidemic among teens many years ago.
Thing is, it only makes things worse for the people you are leaving behind so it's not something you should do if you love them. Even if you feel they don't love you, then it also don't make sense to suicide. If they somehow finally see your value, then you wouldn't be there to feel that love. And if they really dgaf about you, then your death meant nothing. Whichever way you look at it, you're the only one losing.
Suicide is the most worst option. Suicide is actually a state of hopeless & mind weakness. Once a man see no physical means or options to fulfill his wish, whatever is it then he starts thinking negatively i.e towards Suicide. Euthanasia is an exceptional case, even it is also not a good decision but May be it's ratio is too low than normal suicide cases. In modern age, anxiety & depression causes increase in suicide cases.
It actually take a fair amount of courage to delete yourself from existence, albeit it's misplaced courage. Might as well have redirected that into continuing your battle.