Every situation is unique and real-life is flexible - elements of his "style" can probably work.

What's questionable is the objectively bad lead up to the current situation. It's one thing to overhaul a company - it's another to massively over pay for a company, be under immense pressure from added debt, and then fire a whole bunch of people in a very short amount of time.

There's no question here that he would've been better off starting his own company, building up experience while burning a few hundred million, and then buying out twitter at 20bn. He was on the board, he knew what the company was like, he had direct connections with important figures like Dorsey, he had all the information necessary to know that he wanted to make such sweeping changes.