Also can confirm. From the first moment I started an IG account (at my wife's request), the default algorithm was to give me almost exclusively thirst trap posts with zero geographic or other relevance to me. I had to weed through thirst trap accounts that were brought up before hers - when searching by user name.

I took a few minutes a day to search for cat pictures and cooking videos, and sharing cat videos with my spouse (her reason for using IG). It was a fight, but after a few days the thirst trap suggestions immediately flipped to giving me stuff I can look at in public and not feel like a massive creep. There was a long tail, with occasional "....are you sure?" suggestions, but at this point a couple years of carefully reinforcing the same stuff seems to have overwhelmed the thirst trap suggestions.