Hi,Dukanhh
Reinstallation failures are generally attributed to incorrect cleanup methods. Please refer to the following this link to manually remove all SQL Server files and registry entries, and then attempt to reinstall.
I completely understand your frustration, don't worry, we will keep following up on your issue.
Best Regards,
Mikey Qiao
If the answer is the right solution, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment".