I had the opposite experience. Within an hour of using the app it had already profiled that I'm interested in woodworking, military, comedy, and anything with a solid story. I very rarely dislike a video unless I don't want to see that specific creator anymore. It profiles me based on likes (not something I do a lot), subscribes (once a creator has shown up 2-3 times with solid content I usually subscribe), and view duration. I am very quick to swipe to the next video if it's some dancing or other thing I'm not interested in.
Reels on the other hand, all it shows me is twerking and people getting hurt. Complete turn off compared to how well TikTok tuned in to my preferences.