You may disagree, but I'm more in line with publications such as this:
Frank Tallis, We should still pick up the pearls: on the scientific status of Freud, Brain, Volume 147, Issue 4, April 2024, Pages 1115–1117, https://doi.org/10.1093/brain/awad414
"We do not think of Galileo as being a bad scientist because he cast horoscopes. Rather, we consider him to be an excellent one on account of his mathematics. Similarly, our estimate of Freud’s scientific reputation should not be based on what he got wrong—or for that matter, whether his putative affair with his sister-in-law proves that he was a congenital liar—but rather, what he got right. Militant ‘Freud bashing’ has favoured a style of argument that lacks nuance, and sometimes, integrity."
The theories of 100 years of psychoanalysis may not be scientifically proven (nor disproven), but there's plenty of opportunity to do that. There's no need to dismiss any and all ideas coming from that space outright based on some generalization around specific people or their individual-centric approach and reasoning.
"The answer to the question of whether psychoanalysis is ‘scientific’—or not—is less clear than is commonly supposed. Popper’s assertion that psychoanalysis does not meet the falsification criterion, which is often automatically accepted as an incontestable truth, hasn’t prevented ‘scientifically minded’ researchers testing psychoanalytic hypotheses experimentally."
I strongly disagree with your statement that psychological disorders are distinct in terms of etiology. That's just not true, and frankly, unscientific to make up such a claim. To provide some citations:
"The reliability and validity of traditional taxonomies are limited by arbitrary boundaries between psychopathology and normality, often unclear boundaries between disorders, frequent disorder co-occurrence, heterogeneity within disorders, and diagnostic instability."
Kotov, R., Krueger, R. F., Watson, D., Achenbach, T. M., Althoff, R. R., Bagby, R. M., Brown, T. A., Carpenter, W. T., Caspi, A., Clark, L. A., Eaton, N. R., Forbes, M. K., Hyman, S. E., Jonas, K. G., Latzman, R. D., Li, J. J., Nelson, B. D., Regier, D. A., Rodriguez-Seijas, C., Ruggero, C. J., … Wilson, S. (2017). The Hierarchical Taxonomy of Psychopathology (HiTOP): A dimensional alternative to traditional nosologies. Journal of Abnormal Psychology, 126(4), 454-477. https://doi.org/10.1037/abn0000258
"Mental disorders traditionally have been viewed as distinct, episodic, and categorical conditions. This view has been challenged by evidence that many disorders are sequentially comorbid, recurrent/chronic, and exist on a continuum."
Caspi, A., Houts, R. M., Belsky, D. W., Goldman-Mellor, S. J., Harrington, H., Israel, S., Meier, M. H., Ramrakha, S., Shalev, I., Poulton, R., & Moffitt, T. E. (2014). The p factor: One general psychopathology factor in the structure of psychiatric disorders? Clinical Psychological Science, 2(2), 119-137. https://doi.org/10.1177/2167702613497473