Racism, homophobia and misogyny in Ofsted? Possibly, and certainly their current methods and processes need review, but there must be some mechanism for checking school standards. And, any tests or checks can cause undue or excessive stress in some people subject to them.
It is a shame then that you can get away with the most appalling abusive power relationship as long as you aren't misogynistic, racist or homophobic.
Since teaching is a mainly female profession I wouldn't rule out the possibility of misogyny.
It sounds like an inquiry into it's activities is long overdue and it has basked in an invincible aura of a righteous mission for too long.