Huge Project Manager interview questions

Went through Four rounds of interviews which included initial Hiring Manager, then a mix of Senior and Director level Product Managers. Hiring manager talk was informal, informative and generally quite pleasant. I also enjoyed talking to the various members of the team, who were all nice and fairly professional. After completing all interviews, reached out to both the recruitment coordinator and hiring manager, but was completely ghosted. I see now from other reviews that this is not the first instance of this happening. Started off great, but ended in a terrible candidate experience.