CQC official Victoria Marsden said the team had found a “deterioration in the standards of care” provided by the trust since its last inspection in 2016, external.
She said the trust had created a culture where staff could not “deliver high quality, person-centred care”.
She also said some patients had told them they waited two years to access services.
“People had received an initial phone call, but they didn’t always find it helpful and still had to wait to access therapy sessions which they found frustrating,” Ms Marsden said.
The team also found that staff did not always explain to people their rights under the Mental Health Act in a way that they could understand.
Nevertheless, she said most patients told them staff were discreet and respectful.
“They felt staff listened to their views and preferences, and explained their treatment in a way they understood,” she said.
The trust said: “We recognise that improvements need to be made and will take action to ensure that the concerns identified are addressed.”