Hiring process is pretty typical and fast- start off with a phone screen with HR and then an in person interview with 4/5 people in the team

The interviews were fine. There were 2 initial phone screens and then they invited me in for in-person. I met with 4 people for 30 mins each in their individual offices which honestly weren't very nice but fine. The interviews seem to me to have went well. I currently work in a similar position at a competing company so I feel well qualified. The issue was I never heard back with a final determination. I followed up with the recruiter who said I would hear back soon then nothing. I sent 2 more emails which were ignored and not responded to so I dropped it. I just find it so rude and unprofessional that they don't follow up even to say something like they went with another candidate but let's keep in touch.