That's no excuse. If they weren't chasing giant growth, then they could have dealt with the issues as they arose, but instead they're largely turning a blind eye. I've seen so many advertisements served by them that were downright trash (as I've said before in other HN threads... I've seen adverts for: outright scams, malware, gambling, mobile games with extremely exploitative monetisation, porn, incest porn games) and they are tirelessly working to take away any privacy I might have to keep showing me this shit. Then they claim that at their scale they can't do anything about it (or downright ignore it) yet they're the ones who chose to become that big, in an effort to chase profits.
They chose profits over people, that makes them evil and makes people who work for them, knowingly making it worse in order to collect a higher paycheck, also evil.