For me, YouTube is literally the same - I get the same videos thrown into my feed in repeat. Apparently this converts well for YT and the result is that my feed is maybe 10% genuine discovery. The rest is shit.
YouTube also does this weird thing for me where, for example, I watch a couple of videos of an android related YouTube channel about new phones, and then it’ll recommend me videos from 2008 about phones being released then. Lol