Struggling to find FT AM/HF positions, opportunities are drying up. Advice Needed

Stats: 3.5GPA, top public, summer analyst at $25B asset manager junior year, intern at $1B boutique asset manager sophomore summer.

Didn't receive a return offer to my summer. I've received 8 interviews, 3 final rounds for AM RA roles at large asset managers but haven't converted any of them. Some of this is on my interviewing skills, yes, and I'd love it if someone could help me with mock interviews and legitimate feedback.

However, at this point I'm out of options for large asset managers. It's where my experience all comes from, and I've somewhat neglected recruiting for sell-side since I thought I could get an offer in AM. I don't think I have the resume at all for IB and I've always found it tough to sell my passion for it. Private equity is interesting but I always feel like PE shops are looking for IB or PE experience, not AM. I've applied to a couple but never got any interviews.

It's been legitimately disheartening to get so many rejections and I feel like recruiting processes are wrapping up everywhere. I don't know where else to find opportunities.

My current idea is just to whip up the best pitch I can and just start shotgun emailing it to every fund I can find, but I feel this is a last resort if I'm completely out of luck, as this is time-intensive not only to make the idea itself, but emailing is low hit rate too.

Does anyone have any ideas or advice? Much appreciated to all that have any. I genuinely need the help.