Adobe interview questions

They called me on-site right away. Then they told me that they would take initial interviews and based on which they will decide whether to take further interviews. Which was bad, because its better to take phone screen instead of calling for interviews and not taking full interviews. I waited for like 45mins before the HR came to pick me up. Further, I waited for another 45 minutes before the interviewer came and interviewed me. The questions were okay but the whole process was slow.