When people talk about "therapy" here, they most likely are thinking of bog-standard talk therapy, where you just go in and kinda, well, talk to someone about your life, problems, etc.
For some people, it's enough to just get things off their chest, talk about things out loud with someone and helps them deal with their issues. I personally see such a therapist monthly and find it beneficial to my mental health.
For others, especially those with more intense troubles and traumas, it may not be, and would probably be served better by someone more specialized with said traumas.
Like any medical profession, the quality of individual therapists and mental health experts can vary widely, from chuds to libs to comrades and everything in-between. there's a solid chance you may not get the perfect fit on try 1, I didn't.
I just feel like some people are dipping their toes into Scientology-ish "all therapy is bad, never seek professional help for your problems" stuff, which I think is disastrous advice.
Yeah the behaviours you mentioned are a sign of a "difficult" patient (not the individual therapist's fault nor the patient's fault), not a "bad" patient. A "bad" patient cannot exist because the goal is a constant never-ending striving to get as close to 100% of the population healthy no matter what. Saying "what can we do, x% are morally bad so fuck em they deserve to suffer unless they become good" is neoliberal thinking and unacceptable.
Furthermore, such behaviours are indicative moreso of a sick society which tries to compartmentalize the healing of a person's mental illness to a paid hourly visit per week and does fuck all to collectively address any compounding factors that may exacerbate their condition, nor try and help them further, outside of this relationship.