86Borders interview questions

Went through 3 rounds of interviews, The process was rather quickly for scheduling the interviews, and completing them, I felt, and was told I did well in the interviews. I felt very confident, and was given a date when I would hear back. The day came and went, and I was left searching for answers, reached out, no response and days later got an email saying I was not chosen. I felt crushed due to knowing how well I did, and how fast they moved me through the processes to just be left in the air, I felt it was unprofessional, and inconsiderate on their behalf, but moving on hoping another employer can see and appreciate all the experience I bring to the table.