Probably too late now but there is no need to uninstall Gimp. The problem lies in the Gimp user profile which remains between install, so any problems also remain.
Get rid of the Gimp profile folder C:\Users\"yourname"\.gimp-2.8 Run Gimp and it creates an new default profile with empty folders.
Add your plugins testing as you add them:
https://i.imgur.com/1OITFIU.jpgSeveral of the errors in your screenshot come from the normalmap plug. Looks like 32 bit is all you get even if it comes in a "for-win-64.zip" normalmap.exe glew32.dll libgdkglext-win32-1.0-0.dll libgtkglext-win32-1.0-0.dll
Othewise, gimp_gmic_qt / resynthesize + python plugins, all working:
https://i.imgur.com/A2gxcAC.jpgNothing wrong with Gimp 2.8 but you should consider updating to Gimp 2.10