Has anyone here used UX case studies and User Research & Personas to find "real frustration" for a Problem Statement?

Has any Laravel Developer here tried to use UX case studies and User Research & Personas to find "real frustration" for a Problem Statement? And if so, do some web developers do this and if they are trying to find "real frustration" for a REI CRM, for example, and then they find no paint points from User Research and interviews either on Reddit or other platforms, then would it be okay to just move on to another SaaS Product or other web applications until "real frustration" has been found for a web application?