No... making teenagers feel depressed sometimes is not in fact worse than facilitating the Holocaust, using human limbs as currency, enslaving half the world and dousing the earth with poisons combined.
I'm not saying Meta isn't evil - they're a corporation, and all corporations are evil - but you must live in an incredibly narrow-minded and privileged bubble to believe that Meta is categorically more evil than all other evils in the span of human history combined.
Go take a tour of Dachau and look at the ovens and realize what you're claiming. That that pales in comparison to targeted ads.
Dachau was enabled by the Metas of that time. It needed advertising aka. propaganda to get to this political regime and it needed surveillance to keep people in check and target the people who get a sponsorship for that lifelong vacation.
You need some perspective - Meta wouldn't even crack the top 100 in terms of evil:
https://en.m.wikipedia.org/wiki/East_India_Company
https://en.wikipedia.org/wiki/Abir_Congo_Company
https://en.wikipedia.org/wiki/List_of_companies_involved_in_...
https://en.wikipedia.org/wiki/DuPont#Controversies_and_crime...
https://en.m.wikipedia.org/wiki/Chiquita