if you use this correctly it can be very effective.
just venting your frustrations, anger and shit but seeking no advice to proactively diffuse your feelings, emotions, situations that you find yourself in.
actually utilising the person you are paying, and applying their knowledge and thoughts to help you handle your own life can be very effective.
so for me, i seen a psychologist for 8 sessions when i was 23, and at that time i felt the world was against me and i couldnt draw the right card in life for anything. so i just went to this guy, and he was shit, but i didnt know he was shit because he was the first psychologist i seen. so i went and just vented and vented and vented with out taking anything back from what he was telling me. now keep in mind he was shit and i just felt the world owed me something at least. i got nothing out of it.
i started seeing another psychologist when i was 26 and i had matured a bit, just a bit. but i actually realised i need to seek something out of this otherwise i am wasting my time and money. so doing further reading in between sessions and trying to get a better understanding of how to counter my thoughts, feelings and behaviour lead to me having a better understanding of myself which i wasnt intact with previously. this psychologist has picked me up from the pits and shown and thought me heaps of great things that i apply to my own life outside of that room.
psychologists/psychiatrists work wonders only if you put in the hard work too.