Like most, I've been rejected by a few companies. It hurts but it is normal. I've had what I thought was great interviews but not got it, and on the other side

Like most, I've been rejected by a few companies. It hurts but it is normal. I've had what I thought was great interviews but not got it, and on the other side been offered jobs after what I thought was a terrible interview. And I've been on the other side of the table many times and rejected good candidates simply because we had what we perceived to be better candidates. So it is often not even be your fault, just for some arbitrary ranking/preference done by the interviewers that day someone else got the role(s).