I’m not certain Twitter can be fixed.
I’ve opted-out by deleting my account and choosing not to visit the Twitter site. I’ve done the same with Facebook following the same principle. I won’t suggest that my decision had no costs; I miss out on conversations I could learn from and have to be more intentional about reaching out to people in my network. But the costs are far outweighed by the benefits: less frustration, less anxiety, less FOMO.
I highly recommend opting-out to anyone who’s become fed up with the platforms, their conduct or policies, or the way they are made to feel using their products.