And then with the Reels 'flipping' mode of browsing. Also been a core facet of the Reels-specific UI area for a long time now. It may not be the most fun for you but it's not new and many who hang out in that area will be comfortable with it.
Yes, Instagram's copying of annoying things from TikTok and general decline on quality of content experience etc is a common gripe, but that's it, it's a common gripe and part of an ongoing evolution that ppl have been commenting on for ages. Not new. There's a lot of manual finessing that can be done to help the balance of ads and curation you get in your IG experience and it just takes work, all is not lost to the algorithm. People seem lazy and at odds with IG's business goals but that doesn't mean the whole thing has gone out the window.