There's no reason to speculate his motives. It's obvious he didn't want to buy Twitter when he was forced by courts to buy it. He was being an idiot trying to manipulate the stock price. I know it's hard to believe a multi-billionaire can be an idiot, but it happened. There's no 4d chess move. Rich people are fallible as everyone else.
Big parts of the youth did not use twitter. Twitter had at its peak about 500mio active users. Instagram has 2.4 billion, tiktok 1 billion, snapchat 750mio. The relevancy of twitter is highly skewed, because the media used it a lot.