Apart from the title, I do not see any argument why Twitter is a to-be-replaced social network. Personnaly, I see it as a wonderful way to keep track of the topics of interest of people I do not know personnally . Plus I can comment, and these people can comment back. Sounds good to me.
If you haven't been following it, the issue is not dealing with racists, calls for violence, hate speech, bullying, etc. There have been major clear cases and they refuse to act.
Does any social media platform take part in shadow banning? How has that worked out?