Hi LexingtonAssoc,
Welcome to Microsoft Community.
I'm sorry to hear that your device is experiencing performance issues after installing Windows 11 24H2.
Windows 11 24H2 does document some compatibility conflict issues and it has caused problems for some users.
Windows 11, version 24H2 known issues and notifications | Microsoft Learn

If you plan to reinstall as Windows 11 22H2 or Windows 11 23H2 while no longer receiving updates regarding Windows 11 24H2.
You may need to refer to some external sources for earlier versions of the system image files.
Discussion messages from community members in this thread mentioned channel to obtain some of the specific versions of Windows.
The channel is not provided directly by Microsoft and you can refer to the information from Volunteer Moderator or Independent Advisor. Some of the links may be invalid and you may experience multiple redirects.
| Disclaimer*: Microsoft provides no assurances and/or warranties, implied or otherwise, and is not responsible for the information you receive from the third-party linked sites or any support related to technology.* |
After preparing an earlier version of Windows system image file on another device, you can try to make it into a bootable Windows installation media, and then you can boot that USB media on your Asus device to perform a clean installation of Windows.
| Disclaimer*: Please back up all your important data before performing it.* |
- Custom or clean install At this point, we have exhausted all troubleshooting and I recommend that we try to perform a clean install to get your computer back into a working condition. Please ensure that you backup any important data, including Documents, Pictures, Videos, and more. After that, you can find instructions on how to install Windows 10/11 in the following article by MVP Andre: How to: Perform a Custom Installation of Windows 11 and Windows 10 - Microsoft Community

| Disclaimer*: Microsoft provides no assurances and/or warranties, implied or otherwise, and is not responsible for the information you receive from the third-party linked sites or any support related to technology.*<br><br>If you are going to modify BIOS Settings, please back up all your personal files first to ensure you do not lose data. |
After completing a clean installation of Windows, you can try to use specific registry entries to delay the update behavior of Windows.
| Disclaimer*: Generally, modifying registry subkeys or work group is intended for advanced users, administrators, and IT Professionals. It can help fix some problems, however, serious problems might occur if you modify the registry incorrectly. Therefore, make sure that you follow these steps carefully. For further protection, back up the registry before you modify it. Then, you can restore the registry if a problem occurs. For more information about how to back up and restore the registry, click*How to back up and restore the registry in Windows - Microsoft Supportto view the article. |
Thanks for your patience and understanding.
Best Regards,Kyo.Y - MSFT | Microsoft Community Technical Support