i think what youre missing is that regardless of who one follows or let follows them, social media will still barrage them with toxic content.especially as a black person, unless you proactively right click and press not interested on a bunch of bullshyt reels/explore page stuff you are going to see a ton of bs.
my ex girl friend was similar to what you described. maybe a couple hundred followers, private account, no more than 5 pictures etc. But every now and then she would send me a link to some dumb ass post. One example was Kevin Gates saying some shyt about the "flowers dont chase the bees, they just are". I asked her, "do you even know who this guy is?" she mighta even sent me a derrick jaxn video once. i lost my shyt on her
point blank. when your girl is bored and scrolling through instagram she is likely seeing and internalizing a lot of the same bullshyt content these other women are. from makeup videos, to dating/relationship memes, to ratchet musicians (cardi, summer walker etc.), to gossip pages etc.