The old adage applies to social media: "the medium is the message". You can't steer a ship whose whole purpose is crashing into icebergs from crashing into an iceberg. You're working against the whole purpose of the thing itself. Even if these engineers are Facebook were successful another, less idealistic, social media company would pick up the slack of promoting the clickbaitiest most sensationalistic content possible. We already saw this happen with the meteoric rise of TikTok.

I don't know what the solution is, but the incentives created by the combination of algorithmic feeds and how lucrative internet "fame" can be consistently encourages the worst kind of content.