His biggest issue was trying to convince the remaining engineers and Elon that a refactor was more promising than continuing to build on the layers of spaghetti

His biggest issue was trying to convince the remaining engineers and Elon that a refactor was more promising than continuing to build on the layers of spaghetti code that runs twitter. I don't disagree with him, it's just clear that he didn't understand how dire the financial situation was and that even a progressive refactor starting with the most basic features would take considerable engineering hours and money.