San Francisco (AFP) – Twitter co-founder and former CEO Jack Dorsey on Saturday apologized to company staff for growing the social media giant “too quickly” a day after roughly half of the company’s 7,500 employees were fired by new owner Elon Musk. “I realize many are angry with me,” wrote Dorsey, who co-founded Twitter in 2006 and stepped down as CEO last year. “I own the responsibility for why everyone is in this situation: I grew the company size too quickly. I apologize for that,” he said on Twitter. Many Twitter employees had been waiting for their former boss, a charismatic and influen…