It's difficult to defeat the overwhelming feeling of "There is no future (Or at least not a good one), so what's the point?". I feel like even if I live to 100 we're not going to be anywhere close to a Star Trek utopia, but more smack dab in the middle of a Dark Age.
The real tragedy is that we don't need to live in a post-scarcity star trek utopia (which is a physical impossibility anyway). Everything any human could ever need is already in abundance on this planet. You don't need more than community, good food, and art. It's only capitalist ideology that deludes us into thinking we could ever need or want or have anything else. And it's capitalism itself that makes us unable to have these things and makes us unable to enjoy them when we have them.
To try to respond to your post a bit more directly, because I do feel with you:
It helps to read books. It helps to listen to music, especially old music. It helps to unplug from our algorithmic ever-present media world. The things that are given to us by the people in power only have one purpose: To make us believe another world isn't possible, but another world is possible and the more we walk our own paths the more likely we are to get there. It takes effort to seek out the things and connections that allow you to believe in the possibility of a liveable future.
This is not an easy thing to do. It is in fact very hard. Things are very bad, indescribably bad. Things are going to get worse and they are probably going to get worse at an accelerating pace. But there is the possibility of a live that is authentic to yourself and that doesn't close itself off from the world its troubles and its beauty.
I don't really know where I am going with this, since I'm also just in the process of trying to figure this thing out. Making sincere posts on this stupid website and seriously talking about our lives and this here world is already better than most other things you can do on your phone though.