I have restarted using Twitter recently; after not using it for years.

The content you see depends entirely on who you choose to follow. I only follow the people who regularly publish awesome content, initiate discussions, and have a positive outlook on things. Also some credible news sources, and add a few personal idols like Elon Musk.

I did see some people become toxic, start bullying and so on, I unfollow them, or make another decision, depending on the circumstances.

It feels like you make your own community on Twitter. You need to moderate it too.