Background and aim: Substance use disorder (SUD) is multifactorial, complex, and involves the severe problematic use of alcohol, prescription drugs, and other substances. People with SUD have long histories of perceived stigma, marginalisation, exclusion, social isolation, and shame. Moreover, patients with SUD are often treated as untrustworthy and incapable of actively participating in their treatment planning, even by healthcare and social services workers. Methods: Through in-depth interviews with former patients who have undergone SUD treatment, we explored their reflections on the treatment content. Interpretative phenomenological analysis revealed that some informants experienced aspects of the treatment as valuable, whereas others considered the same treatment useless or harmful. Results: Essential aspects of treatment were developing self-esteem and optimism about the future, developing strategies for coping with stress and challenging emotions and situations, developing relationships with family and friends, and preparing for life after inpatient treatment. Relationships with staff were described as crucial in all parts of the treatment. Conclusion: In conclusion, we suggest that a transition to a more collaborative treatment philosophy would be ethically and professionally valuable for providing support and treatment and enhancing patients’ perceptions of empowerment, inclusion, participation, and well-being on their terms, in cooperation with supportive others.