Help!! Idk what to do

Hello, so I installed MacOS Sonoma on my 2015 Macbook air, and it worked fine for a couple of hours until i restarted it. The Mac had a white outline on the dock, i tried turning off reduce transparency and stuff on the settings, but it was still there.And i noticed it was significantly more laggy before i restarted it. And so i decided to do the post-install root patch. Then it told me that it failed the sanity check and couldn’t continue further. So after trying to find a solution here on reddit on some post, i installed MetallibSupport and Kernel debug. But that too hasn’t worked. Im just confused.