Yes, I felt the same too. You said what has been in my mind but I was unable to articulate it. Sometimes I would be shown random post from extremely distasteful subreddits which I never subscribed to (awefuleverything I think). Sometimes I would get messages from random fake accounts with nude pictures of women asking me I am indeed. I haven’t used Reddit in a while. I used to be addicted to it. At its beginning Reddit represented freedom promised by the internet. Maybe because if that people don’t dis Reddit but focus on Instagram.