What do you mean by happy? Happy that you have a job? Sure, why not. Happy with your life? Perhaps that’s harder, but if you don’t define your life by your job it is possible. In US people often ask “what do you do?” As if your job defines you. There are many accountants out there who are very different from each other, some learn a lot, some do a lot of chesed, etc. So if you define your life and how happy you are with it by what you do outside your job, it is easier to live a happy life despite a job that you might think is not ideal for you.
Here’s another question, Is possible to be unhappy in a job you love?
You might love accounting, but if you feel unfulfilled in your life you will be unhappy.