I was one of Twitter's first 500 users. Later, I worked at Twitter on anti-abuse. I was a big fan. But I quit using it after Musk's takeover because I didn't want to be supporting somebody who's awful in a half-dozen ways that have only become more obvious. [1] And X reflects that.

I'm not the OP, but anybody honestly wanting to know why people think good humans should not use Twitter does not have far to look.

1. E.g., https://www.theguardian.com/technology/2026/feb/12/elon-musk... and https://www.washingtonpost.com/technology/2026/04/24/musk-on... or his Economist interview.