Based on that interview, he thinks this is only because of his own comments and tweets. He doesn’t recognize that it is because he allowed all the shitty people back on the platform. It’s not just his tweets that are an issue for advertisers, it’s the rise in anti-Semitism and racism across the platform as a whole after he brought back everyone that was banned for it previously.
This is exactly what everyone predicted would happen, and either he honestly can’t see it, or he refuses to acknowledge that he could have been wrong about it.
There’s a reason nearly every company handling social media moderates those discussions out, because advertisers don’t want to be associated with shitty opinions.