Say we have a person who hates being exploited (or exploiting) for their labour under capitalism with every fiber of their being.
This person struggles to hold down a job as a result. They get disheartened, experience injustice, feel sick to their stomach, seeing and experiencing the practices of nearly every organization.
They don't hate working, but they hate watching their company destroy perfectly good merchandise so people can't take it from the garbage. They hate watching executives make stupid amounts of money while they barely scrape by. They can't stand seeing the face of the manager, knowing how much moral damage they're committing every day.
They tried moving to a non-profit, perhaps getting out of for-profit industry will help. Not a chance. Budgets are miniscule and working conditions suck. Hours are unreliable and money is even worse. There's still plenty of money crunch, trying to do too much with not enough, and at best their job only exists because the world-at-large has not implemented policies that have rendered their job obsolete like they should have. They're an inefficient band-aid, offering a guise of genuine help, while still padding the pockets of executives.
So they move to a cooperative, thinking it will be free of exploitation. But they still subject to working with for-profit vendors and outside sales, marketing and advertising – one of the scourges of capitalism – and probably still promoting consumerism -another scourge of capitalism – because staples tend to have low profit margins and are difficult to run a business with without some gimmick or higher-margin items.
A therapist would likely say this person needs coping skills to find ways to find gratitude and acceptance of the world as it is. The world is imperfect and cruel, but we still need to live in it, and it's the therapist's job to help you live in it contentedly, despite its flaws.
What would therapy look like for a person like that?
I can imagine attempts to redirect the hatred, frustration and alienation into something more constructive, like starting or joining movements.
Alternatively, therapy may help this person find coping skills on the job to ensure that they are less likely to sabotage their own careers, with the objective of ensuring steady income and therefore survival, leading to ideally better mental health. The problem is that survival alone is not the issue for this person. The issue is the injustice.
The therapist then could encourage coping with injustice via radical acceptance or other techniques. Say this is successful. This person is now more capable of maintaining an income, making it easier for this person to do things like start or join movements.
TL;DR: Is this the role of therapy in capitalism, from a left-wing perspective then? To help give us the ability to cope with capitalism long enough that we can do something about it?