Failed interview hard - ranting

This post honestly is half a question and half ranting. I just did a second round technical interview for a pentesting engineer role. I just feel so gutted by how badly I did. I technically have 5 years of experience in pentesting but couldn’t answer a lot of these questions well enough:

1. Experience with pentesting and tools you have used

2. OAuth - how does it work? what are the flows? (fine to this point)

3. What is PKSE? (o heck idk what that is)

4. For what kind of application would you use Implicit flow rather than Authorization Code flow?

5. In OAuth, how does a service-to-service authentication work?

(there were some more follow up questions but can’t remember, i was panicking)

6. Given a JWT, how would you try to test it?

7. How would you test for XSS?

8. Tell me about DOM-XSS. How would you deliver a DOM-XSS attack?

9. Tell me about XXE injection.

Some of the questions I answered better than others, but a lot of them not well enough and not quite to the interviewer’s satisfaction. Especially the OAuth ones. I could tell as time passed, interest just faded from his face. He was saying things like “I was gonna ask about this but that’s ok” and “eh not quite.” Towards the end he left the call abruptly because his boss was calling. At this point I’m very sure I won’t hear back.

this interview was brutal. i’ve failed interviews before but this one stung a lot worse. I’ve been job searching since October and my first interview with the hiring manager went very well so I was feeling hopeful. and the vibe was intense. I felt thoroughly judged for every answer I gave, and at one point he was side-eye smiling and it felt like he was laughing at my answer.

He said the team was looking for a Junior engineer but I felt that the depth of the questions were beyond what I expected. Is this the right level of questions for a Junior role? If so do I just not have the right experience and knowledge for my time in the industry? Am I just not cut out to be a pen tester? I’m just spiraling and feel utterly defeated…. I know interviews are practices and you get better by practicing, but it’s been so hard to get interviews at all. At this point Im convinced I don’t have what it takes to be in this field.