What's the point with that quite lackluster story in Endwalker?

[CrownySuccubus]

And on a similar note, while I don't have a problem with the notion of letting yourself depend on and seek help from others in times of difficulty, to me the game seemed to push this underlying message that your life is essentially meaningless and intolerable without people around you, which is… really, really awful, although they've been at this for a couple of expansions with their habit of turning isolated and tormented characters suicidal and/ or into irredeemable villains. Some people are unfortunate enough to go through painful and difficult periods of their life alone, or lacking a loving and supportive network around them, and there is something offensively tone deaf and potentially harmful about the way they write off such characters as doomed or hopeless. I think Krile alone had one line prior to UT about remembering/ holding onto your passions because they are what drive you, which for a moment was a breath of fresh air and seemed like a promising exploration of what other kinds of "meaning" life might hold for someone… only to add that it's because "you share them with others!"

What you experienced in Endwalker is another example of this; you are correct in that Endwalker's ultimate "lesson"...the thing that the audience is supposed to take away from the story...is "life sucks but it sucks less when you're part of a collective, so make sure you're part of that collective at all costs". The "bonds you share with others" is repeated and touted over and over again as the key to everything..

Japan is an extremely collectivist society. How collectivist? Collectivist to the point that people are afraid that helping someone on the street would make them stand out too much. Japanese culture praises the value of the group over the individual. It's one of the reasons that social change is very difficult there; pointing out problems or stating that something isn't good for society is shunned because it's considered worse to introduce negative feelings.

For more on the subject, I have to recommend this video by "Let's ask Shogo", who is a Japanese man who explains it better than I do.

It's exactly why I think that a broader variety of viewpoints need to be brought to the forefront and pushed as acceptable.

This is not an issue that could be solved by a "broader variety of viewpoints", unfortunately. Subjects on matters of mental health, depression, suicide, etc. are, in fact, the opposite.

It's a subject that you should not be bringing up without listening to the experienced and trained professionals who handle it.