Huh. How else would you get a massive company that has let certain bugs sit for decades to address them? This method is probably just as ineffective as reporting another bug into the Black Hole of Bug Reports that is Apple, but this one is at least mildly funnier? YMMV of course.
The search bugs in Mail are absolutely real. They might not affect every user but I've had major issues on both macOS and iOS mail, and eventually gave up and switched to Gmail.
Have you checked if it’s the fault of your mail providers? The search function queries the remote mail servers in addition to the local cache. If the mail servers return garbage you get garbage results.
