It was left leaning until about 2014. Then it slowly crept farther and farther right wing. Slowly bleeding users who didn't want to deal with the fascist jerks. Slowly converting fence sitters into fascist jerks by normalizing fascism by pretending it was just asking questions, just making edgy jokes, you know the drill. Next, 2016 came. That for me was when the bottom fell out of twitter. The Russian twitter bots were everywhere. And it took twitter way too long to deal with it. I think by that point, the platform was ruined. It was never going to grow meaningfully by attracting new people. It was just going to slowly decay as people looked for their friends and favorite creators on Reddit, Discord, Youtube, or wherever else they went. But that decay would have been slow until Elon tanked it. His efforts have chased off users in droves