Took a long shot and uninstalled Qustodio just before attempting to reinstall the machine... apparently Qustodio and the latest Windows 11 updates don't play nice at all. That's unfortunate.
TLDR; See Windows 11 Input Lag and System Instability
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This is a cry for help, advice, anything.
I have tried very hard to be patient with MS since the end of May, but I have had 2 very powerful laptops (Asus TUF A15, 16GB, Ryzen 7 4800H / Lenovo L5i Pro, 16GB Intel...