Nothing on social media has been more harshly hated than Instagram's new ranking system. If your Instagram photos receive a lot of likes, they will be rated higher, then your photos will be "featured" and receive even more likes. If your photos receive only a handful of likes, they will be rated lower, possibly be "buried" and your photos will receive even fewer likes.
It's becoming harder for a casual user to have fun posting on the platform because their photos will always take a backseat to Kim K's photos. If Kim K posted a photo grid whose photos individually made no sense, each one would STILL get hundreds of thousands of likes and show at the top of everyone's feed...taking up space that could be used for other posts.