Advice Needed: Bad Head Hunter Call :(

I had a head hunter call that went pretty bad yesterday. I did some light prep ahead of time - built some LBOs, reviewed my deals on a high level, and came up with an answer for common questions like "why PE?" and "how'd you get into finance?" I was under the impression that it would be an informational chat and should've paid more attention to the warnings on WSO.
 

Needless to say it wasn't very informational. He asked me about some deals on my resume, which I spoke briefly to but didn't review in depth. I just discussed my role and what I did, but I could tell my answer was unsatisfactory. He also asked me to walk through a case study, and I think I did mediocre. I answered it, but it definitely wasn't as structured as it could've been if I had prepped more. Similarly with some other technical questions, it was correct but I didn't structure it correctly and kept rambling. Now I'm worried that I completely ruined my chances with this HH. I thought the basic prep I had done would be sufficient, but it absolutely wasn't. The chat was mediocre at best, but now I'm worried I didn't make the good impression necessary to get the interviews I want. He also seemed pretty bored during the call. Is there any way I can make it up? Should I schedule a follow-up call later on to show them my improvement? I'm at a good but by no means top bank, think moe/laz/ghl (though I'm honestly not super in touch with how banks rank up to each other), so I'm worried that I'm screwed.

Has anyone else been through this? How did you handle it? Has this interaction actually tarnished my on-cycle chances with this HH (for the firms that I want)? They have a very strong client list of firms I'm interested in, so I'm afraid this wasn't the chat to screw up.