I am just now beginning to walk after dragging myself out of this hole.
The followers that come from botted f/uf and likes are SHIT. Look at your activity feed...see how 90% of your followers follow without liking a single photo? They don't engage on your photos.They wont comment. They just follow back cuz they feel like they should or just never use IG etc. When IG sees this behavior growing, it thinks you suck and the ago pulls your account way down everyone's feed.
On the other hand, when I pay for an ad, about 1/3 to half of the new followers will like a few photos. Not only does this show that they are much higher quality accounts, but they have given the algorithm data that I am worth showing to them.
There are +9 billion accounts out there but you only want a few of those following you...trust me.