I have an IG account that I barely use, whereas my Facebook account I do (regrettably) still spend time on, and have put in the effort to silence/hide the worst of the baity type content that it wants to throw at me.

But interestingly my experience of IG when I do occasionally go on it is similar to what TFA describes: lots of engagement-bait / thirst trap content that I never asked to see but also haven't been around to hide, so I guess the baseline algorithm is just matching me to what others in my demographic bracket have found, um, engaging.