You should be more specific, so that opaque disagreement would resolve into particular arguments.
psychology isn’t nearly effective as everybody thinks
This isn’t specific enough. What kind of claims are believed by whom?
line of retreat for the psychologists
What kind of wrong claims do the psychologists themselves believe?
very often psychology is useless and sometimes it is even dangerous
What do you mean by ‘psychology’ in this context? It’s a very broad field of study; consulting psychology (if that’s what you are thinking about when you say ‘dangerous’) also includes many significantly different therapeutic practices.
You should be more specific, so that opaque disagreement would resolve into particular arguments.
This isn’t specific enough. What kind of claims are believed by whom?
What kind of wrong claims do the psychologists themselves believe?
What do you mean by ‘psychology’ in this context? It’s a very broad field of study; consulting psychology (if that’s what you are thinking about when you say ‘dangerous’) also includes many significantly different therapeutic practices.