There are many tech companies that aren’t ad tech, crypto or encouraging unnecessary consumption. Look at the list of YC companies and you’ll find plenty (
https://www.ycombinator.com/topcompanies/). That’s not to say that non-YC companies aren’t worth working at. There are a lot of ways to make the world a better place through technology, like electrifying existing industries. Sorry you feel like tech has no answers for you. I’ve been there.