Interesting. My stack ranking of unethical tech companies would have Twitter at the very top. None of the others have caused as much societal harm as Twitter. I saw research recently that as much as half of all trending topics in Turkey were manufactured by malicious actors to spread propaganda. Also, it's just an endless pit of addictive negativity. I once had a girlfriend who would browser Twitter for hours on end and was perpetually angry. Not a good way to live.

Google, on the other hand, has a bunch of products like Maps, Drive, Docs, and Meet that are legitimately helpful and useful. I would have no ethical qualms about helping to make Docs better. This is not to say Google is an ethical company in the aggregate, but there are certainly a lot of roles you could take there that would not require you to question your morality every time you start a new task.