Therapy can be great. It can help to learn new ways to think about things. It can be very helpful. Still, it can't change your life or brain. A good therapist knows this. Sometimes, the best you can do is to learn to live with your situation. Therapy can help to gain acceptance and talk about possibilities. You could work on learning about what you can and cannot do.
For people with nice lives who experience a sullen mood, therapy might feel life changing. If all you need is a bit of perspective, then getting that would be very helpful. But, it's just a tool. It's just one thing that can be helpful or not.
If it hadn't been for therapy, I probably would not be here to write this. Whether that's good or bad is up for debate, but therapy has made a difference. It also mattered who I talked to. Some people just couldn't understand as well as others. The toughest lesson to learn was that no amount of therapy would cure me. I will always be the way I am. Now, therapy is more about how I can live within my limits and utilise my strengths for a better life. I think I know it won't be enough in the end. I think that someday soon I'll be ready to end it all, but therapy has helped to keep me going just a little while longer and manage the pain just a little bit better.