Does everyone just hate living? I mean, what gives?

You can go on almost any subreddit about life, mental health, casual conversation, ect. and immediately find someone explaining why life sucks so much. Venting is all well and good, and I really do get it, as I’ve dealt with my fair share of extreme low points and existential angst in my measly 20 years, but are these people just figuring out that life is really hard and unfair? I simply don’t understand wallowing in despair. I’ve learned that it doesn’t help, and it can even lead to a vicious cycle of believing your negative thoughts. You will become your despair if you feed it. You become a more negative person overall. You’re not engaging in deep conversation by explaining that life sucks. Everyone already knows to some degree. I’m sorry if this reads as inconsiderate or arrogant. It’s just heavy on my mind right now. And I understand that just because I feel okay at this very moment doesn’t mean that life won’t subject me to a good f*cking soon, and then I may be another one of the doom posters.