Is it hard to get South Korean citizenship?

Excuse me, I'm interested in the matter of South Korean citizenship. I've heard that the process can be quite complex and challenging. Could you possibly enlighten me on the specific difficulties and requirements involved in obtaining South Korean citizenship? I'm particularly curious about the eligibility criteria, the length of the process, and any potential obstacles that one might encounter. Additionally, are there any specific steps or strategies that you would recommend to make the process smoother? Thank you for your time and assistance.