Instagram has been around too long so gets largely ignored when people talk about bad influences from social media. Even though, realistically, any photo/video-based social media is awful for teenagers' self-esteem and mental health. [0]
Instagram's influence on people is of a different kind (which doesn't mean it is not a concern...). TikTok directly fuels violence and low IQ, especially amongst teenagers.
Don't forget it was also the chosen Livestream platform for the CHCH shooter and was where the "J6 Insurrection" was planned (hence the frantic redirection and sacrifice of the scapegoat known as Parler)