No, it's not hard to be a branch manager. A bank branch manager oversees the operation, administration, marketing, training, lending, and security of a local bank branch.
A branch manager is responsible for handling any customer issues, ensuring proper protocol is followed, and overseeing bank tellers. This job is not hard, but it can be stressful.
Bank managers may also have goals that must be met, specifically to generate new accounts through deposits and loans. Goals are set by executive management and expected by a specific deadline.
A bank manager is responsible for the performance of an entire department. Not every individual is cut out to manage employees. As a manager, you will deal with a myriad of personalities, demands, requests and conflicts. You must be able to interact with your staff as well as the public, making it a difficult job.