In the 90s, while I didn't believe tech would bring about a "utopia", I did believe tech would be a very positive, powerful force in human society. The Internet was supposed to "bring us all together" when it made it easy for us to communicate without boundaries. It would cause the fall of authoritarian regimes as societies had freer access to knowledge.
In a major sense, though, the exact opposite has happened. Social media has torn us apart. Authoritarian regimes have discovered how they can control their people with rage bait and blind patriotism. And most importantly, from a personal perspective, I so often see tech not about improving the human condition, but how we can better addict people through dopamine scrolling, or insert yourself as a middleman in "winner take all" economics. In short, I've become intensely disillusioned about the positive power of tech, and that's a tough pill to swallow after dedicating the majority of my career to tech (and, transparently, I see the role I played as often part of the problem). I'm just very sad with how it all turned out.