Complex sentence: This is humiliating, intimidating or abusive behaviour which is often difficult to detect leaving no evidence other than victim reports or complaints; this characteristically lowers a person's self-esteem or causes them torment.
Split into simpler sentences: This is humiliating, intimidating or abusive behaviour which is often difficult to detect leaving no evidence other than victim reports or complaints. This characteristically lowers a person's self-esteem or causes them torment.