How useful is corporate experience early in your career?

+1 for Richard Kuchinsky. Any job is what you make of it.

You should talk to your bosses - and be honest with them. Maybe expectations weren’t clear before you started? They will probably have some insight for you about the place and the job. It doesn’t matter where or what work is - if you don’t mesh with the team, you’ll never be happy. It takes a while to identify what you are looking for in a job - and then figuring out how to evaluate a place or team in the limited time of an application or interview process is even more difficult. Trust your gut (blink), if you are already questioning - you’ll need to do something about it - quitting however, may or may not be the answer.