Because expressing anger towards yourself is both undermining and selfharming and it's not very affective.
因为对自己表达气愤是具有潜在破坏和自我伤害的,而且不会很有用。
2
As a teenager I was self-harming regularly.
我十几岁时经常自残。
《牛津词典》
3
'Ziggy had suffered from depression from her late teens,' Rosie says. 'the self-harming and the first suicide attempt, the overdose, happened before she met David.