I worked in a care home in the noughties and there really seemed to be no awareness at all that sexual abuse was any kind of concern. Absolutely zero. It was a ward for elderly people with mental illness, mixed sex, some mobile and some not, and there were no locks on the bedroom doors. At one point it transpired (what a surprise) that a male patient was going into a female patient's room and "touching her". It was suggested that maybe locks on the doors could be arranged. They did not appear.
There was a male carer who was profoundly sexist, saying to female patients "you're just a woman" and laughing in their faces. Hideous man. I didn't report his behaviour - not that I think it would have made any difference.
A female patient, who could not speak, who had been in just a few weeks, suffered a severe decline in her mood, from confused but quite sparkly to hanging her head in misery. Her husband was distraught and asked every visit, in tears, what had happened to her. I was changing this woman's clothes one day and discovered bright green vaginal discharge. I showed the Nurse and she said "Ooh, I don't know what that is, but I've only seen it once before and the patient died soon after".
I didn't blow any whistles, I just suddenly felt like I wasn't enjoying the job (no shit) and left. I regret this so much that it haunts me to this day. Especially because I was in a very privileged position compared to most care workers and had far less to lose. I wonder how many others, dependent on the income, would have been in the same position and felt unable to speak out.