Infineon Technologies Hardware/Software Engineer interview questions

Worst interview experience I've ever had; I couldn't even call it an interview because they had us wait for 6 hours and then said, "You can all leave now." Giving an interview and not getting shortlisted is one thing, but not allowing the eligible candidates who have passed the Online Assessment previously is disrespectful. I have no idea how they operate as a company since they can't conduct a fair interview process.