Startpage recently got acquired, and is now (at least partially) owned by an advertising company. As a privacy advocate, I don't trust them. I use DuckDuckGo, I don't use Startpage.
However, you have to think of privacy and consumer hostile behavior as a continuum. Even though I don't trust Startpage as a private search engine, I also don't trust Google as a private search engine. The question is, "is Startpage still better than Google?"
I think it is. I think if you're in the position of saying, "I can't use DDG, I get the privacy issues, I get the monopoly issues, but I just don't like their results", then Startpage is still going to be a pretty big step up in privacy over Google search. Startpage is still going to be a good way to fragment your data so one company doesn't know everything about you. It's still going to be a good way of getting around the worst user-hostile UI changes to blend ads into search results.
If you disable Javascript and run a Google search, every single link you click on gets wrapped in a Google URL to record that click -- there is no way around that without some kind of browser extension. If you disable Javascript and run a Startpage search, you get direct links to the website.
So I heavily encourage people in your position to use Startpage if the alternative is continuing to use Google Search directly.