Your question is probably best answered by
@dosdude1 or someone with more knowledge of his patcher - it sounds like you may have the legacy video patch installed, even though you said you chose not to.
Since you mention seeing System Info, I assume you're able to boot to the desktop. Try the following:
- open a terminal window
- type
kextstat | grep MouSSE
You should either see a line containing
AAA.LoadEarly.MouSSE
(0.xx) or nothing at all (just a return to your shell prompt). If you see the MouSSE line, MouSSE is loaded, and the problem lies elsewhere (again, my guess is that the legacy video patch is applied). If you don't see the MouSSE line, MouSSE is not loaded, and that's at least part of your problem.
Did you do a fresh install/reinstall of Catalina, or did you just re-run
@dosdude1's patcher and un-select the legacy video driver? If you did the latter, that won't uninstall the legacy driver - you need to reinstall Catalina to do that.