The thing that scares me the most is a clean windshield on my car.

Don't get me wrong. I hate having dirt on the windshield. However, I remember a time when in summer I was in a constant battle to clean spattered insects off my windshield. Now I almost never hit an insect.

I haven't moved. I still drive on the same roads I used to drive on. Either the insects have evolved to avoid roads, or they just aren't there anymore.

Life on this planet is dying out, and we're using all our technology and all our resources to allow us to pretend it isn't. Eventually, the extinction will outpace our ability to compensate, and we'll all start dying along with everything else.

I don't actually believe life will cease completely. I think when enough people have died, they planet will recover. However, the millennia between the crash and the recovery will be unpleasant for anyone who manages to survive long enough to experience it. And the deaths of those who don't survive long enough will be horrifying.

Biggest fear I can't control: living a life where I get walked over, where nobody seems to care about me but expect me to drop everything for them (wait, that's my life right now)

Biggest fear I can control: thalassophobia

What are your three biggest fears?

In all seriousness though, basically this:

https://en.wikipedia.org/wiki/Effects_of_climate_change

Sea level rise is already not a question of if but when and how much.

We're seeing evidence now that ocean temperature increase is accelerating, and ocean current patterns which have been stable for the entirety of recorded human history are collapsing. There have been several extreme heat events around the globe this year.

So I guess my fear is that I'll live to see everything descend into bloody, desperate chaos when all the infrastructure we've built fails, and food and water scarcity become a daily concern for the entire population.

For a time recently I felt extremely overwhelmed and fearful of the idea that in death there is nothing and your consciousness slips away into a black nothingness and everything I had ever done was completely meaningless and that my existence was for nothing.

Making a small mistake that snowballs into manslaughter.

Loneliness. Without my wife or dog, I would descend into a most dark place.

Probably spending the rest of my life alone.

Severe physical pain. I'm not really afraid of death, however a gruesome and painful leadup to death is what scares me the most

Being trapped in a country that descends in to rampant transphobia

Being misunderstood and I am living it everyday (neurodivergent).

Modern life, with modern politics, has been scary enough that I struggle to imagine what could scare me anymore. I've been homeless three times, I've had friends die young, I've come to a point of acceptance and I'm not sure if it's healthy or a sign of being beaten down so much that acceptance is my cope.

Exactly what I'm living right now, the whole thing.

The word "ur"

Watching stuff like the Expanse or the Martian made me realize how much I'm scared of this vast open space. It makes me super uncomfortable to watch those astronauts in these movies often without any form of security doint something outside in space. All I can think of is one tiny asteroid and you are gone. Drifting in this vast empty space, watching all your life control fail over time and just slowly die.
So scary but also veery unlikely to happen to me :D

The destruction of all life due to a runaway process, e.g. paperclip maximizer or other such maligned goal seeking program

Getting excluded from society.

I'm part of a heavily politicised minority, and the possibility of that minority being (quasi)outlawed/societally shunned is real and very scary.

To a degree that scenario feels like a death sentence.

Yea I think yours is a pretty good one, we all have that particular dear deep down.

Also the fear that I will never again will live under that self-evident feeling of safety and comfort (German: Geborgenheit) that I know dorm my childhood

The destruction of everything I know and love merely due too ignorance, malice and apathy. OH WAIT

Drowning in a small space like underwater caving. I'm a bit catastrophic (claustrophobic). Normally no issues with water but the thought of being trapped somewhere small and watching it full up with water terrifies me. Safe to say I am never going caving or swimming in caves.

Oh and the apparently inexorable march towards fascism in the UK and the west is pretty bad too.

apart from the normal ones: balls/flying objects above the size and weight of a badminton ball.
Its because at every opportunity someone accidentally threw a ball into my face.
It got to panic attacks after a shoe landed in my face.

The fear got to the level i can only get to close proximity of a sport ball if i know the intent of balldirection is opposite of where im standing (its possible for others to kick a ball to a goal but not to kick it back, they would need to carry it). Else i dont even visit very ball sporty places

ur

My biggest fear is that people are forgetting how to write actual words.

Abandonment, by far. Fun fact: 0 fear of death.

Edit: btw OP, what is your success criteria for life?

"Our deepest fear is not that we are inadequate. Our deepest fear is that we are powerful beyond measure."