Support is available through email or the form on the support site (with a link in the launcher and details in the stickied support topic). Ideally I would like to have the time to actively follow the forum again and provide support, but it has been a while since that was possible.
The graphics issue you describe is generally caused by older drivers, especially if nvidia has stopped driver support for your card. Check their support site to
search for the latest drivers.
If required, one way to check which model card you have, and the version/date of the current drivers, is to click Start (or WinKey-R), type in dxdiag and hit Enter, then in the window that opens, switch to the Display tab.
Try resetting your graphics driver's 3D settings to default (right click an open area of the desktop to start the nvidia Control Panel).
In the launcher, try switching between DirectX 11 and Vulkan, as applicable, to see if that makes a difference.
Try updating the Vulkan Runtime. Normally this is included with graphics drivers, but manual updates have been reported to fix a couple of crashing issues, and it at least has a chance of helping with the Vulkan version. The Runtime installer can be
downloaded from this site, or
the direct download link.
If driver support has stopped it wouldn't hurt to try a clean reinstall of the last version. If you have the current version of the drivers already, this would have a better chance of helping. See
here or
here, for example.
If you didn't do so when deleting the profiles, try browsing to the 'C:\Users\<UserName>\AppData\Local\Larian Studios\Baldur's Gate 3' folder and delete or rename the graphicSettings.lsx file, to get the game to recreate it the next time it is started. The fastest way to get there would probably be to copy the line below into the location bar in Explorer and hit Enter.
%LocalAppData%\Larian Studios\Baldur's Gate 3
