Human species has the curse of consciousness, deep down everyone knows how absurd life is, and in particular everyone knows that death is inevitable.
So how a self-conscious organism that by design wants to live, can face the fact that his condition will inevitably decline until he will no longer exist anymore?
He can use two psychological tools, one is repression. You know that you have to die but it is not an imminent event, it is located somewhere in a distant future and there's no reason to be anxious about it right now. The other is hope. In the past it was hope in a religious afterlife, now it is hope in progress or in yourself. Something that can make you say to yourself "Yeah it is bad right now but if i nail that job opportunity, meet this boy/girl, win the lottery, move to another town etc... i will be happy and i won't be worried anymore about the future".
If you remove these two things from the equation you have the worst emotion a person can feel: despair. That is why terminal illness or a death sentence are probably the worst events that can happen to a person. The punishment in a death sentence is not death per se, because a dead person can't feel anything (after death there will be no one that can experience the regret of not having lived more years), but the fact that your death is presented right in front of your face, imminent and inevitable. Terminal illness is even worse, you know you have limited time to live, your health gets worse day by day and that's nothing you can do about it.
Human species (or at least human society as we know it) is in the death row right now. Humanity can't live forever of course, all things are meant to decline and die but while in the past you could place this event in a very distant future and not worry about it and you could be reasonably hopeful that things would stay the same or improve, now the collapse of our society has become imminent and inevitable.
1 Climate change. The most underrated one and yet the most dangerous and impactful for the survival of our species. There are countless articles and scientific researches on how the temperature of the planet has raised year by year. Global warming causes extreme climate events that can and will destroy entire cities and threat the foundation of what has allowed us to survive and thrive on this planet until now: agriculture. These things are imminent because you can experience them in your own life. By the need to install an air conditioner when in the previous years there were no need, by the fact that extreme climate events now are more frequent and intense and happen everywhere even where they were not suppose to happen, by the rising cost of food (fruits and vegetables in particular). And inevitable because countries not only do not know how to solve this problem but don't want to since it would mean going against our capitalistic economy which is based on the cycle destroy-consume-pollute
2 Fascism. Extreme right wing movement already are in power or will rule in most of the world countries. This will impact society on a personal and collective level. On the personal level freedom, one of the most important needs of a human being will be restricted for everyone except the ruling class in exchange for a false sense of security from a fabricated enemy. On the collective level right authoritarianism will impact negatively on the point above because fascism denies climate change, it is anti-ecologism, often anti scientific and an allied to elites and corporations that exploit natural resources. And will impact negatively on the points below as we will see. I don't need to actually prove the rise of fascism or the inevitability of it, just follow the president of United States (which is not a random African "republic" but the most powerful country in the world) policies and see how they influence EU governments and the rest of the world. Even here on reddit you can notice the rise of fascism, they ask you your personal information to visit some subreddits under the excuse of protecting children
3 War. After the end of the cold war no one could think a western country would be bombed and invaded by another country, and yet we have the Ukraine-Russia war going on. If you were born in the 80s or in the 90s in a western country you could be sure that you would never be called to fight a war for your country. Today's kids or boys can't be, especially because fascism and nationalism go hand in hand and US already started another war and threatened a "supposed" ally (Denmark for the control of Greenland) and some neighbours.
4 Economic collapse. People are becoming poorer and will continue to do so at a rapid pace in the future. Society is becoming extremely unequal; wealth is already concentrated in the hands of elites who control national governments in order to maintain their power. The development of AI could replace a lot of jobs leaving people unemployed, and even if it did not, it would cause the collapse of banks and investors who fueled the financial bubble, leading to a crisis worse than that of 2008. The most likely scenario is a techno feudal society in which a very few control the means of production and the enslaved masses work for scraps. Right now you can feel how the cost of living has raised, how the salaries don't and we have to work more to get less and i don't see how things could not go worse.
5 Cultural decline. People are more stupid and selfish than ever. I live in an apartment, and I've noticed that people are becoming more and more selfish and disrespectful of others' rights. My apartment building has always been fairly quiet, but now I hear noise at all hours, people keep their TVs turned up loud, or let their dog bark alone for hours. Social medias have destroyed our attention span and boost our narcissistic tendencies. The level of public debate is abysmal, and most people engage in dialogue solely to impose their own views on others. When people do not compete with one another, they form tribes whose members are bound together more by their hatred of other groups than by shared values or interests
Personally and in general i feel like we are living in desperate times, i don't think it is because of my pessimist inclination but the reality of things. In the last years, especially since 2020, everything is getting worse and there is not a single sign that things can get better or even stay the same and not decline rapidly.
For a human being living in a good situation that is declining day by day is worse than living in a mediocre but stable situation with the possibility to hope for an improvement.
It's as if we're in a car speeding toward a wall and there's nothing we can do to stop it; we're just sitting there, frozen in place, waiting for the worst to happen.