To me Facebook, Instagram and Twitter went completely downhill when it became about #2 for me and my social circle. Twitter was the first, followed by Facebook and then Instagram. I just deleted them in that order. To me they became divisive, angry, political, it made following certain friends impossible, it made people addicted to it, it generated influencers, it made certain friends behave strangely IRL (communicating via meme language only).
HN is definitely #2, but way less political due to moderation.