Perhaps we could suggest OP other things to try before we suggest they should rip out their GPU. I don’t know, basic problem-solving approach, like using the Nouveau or generic Vesa driver to rule out the proprietary Nvidia driver, or a different screen-sharing method to rule out RDP. Which is a proprietary Windows protocol so it may not work perfectly from Linux and with an unusual hardware configuration.
Perhaps we could suggest OP other things to try before we suggest they should rip out their GPU. I don’t know, basic problem-solving approach, like using the Nouveau or generic Vesa driver to rule out the proprietary Nvidia driver, or a different screen-sharing method to rule out RDP. Which is a proprietary Windows protocol so it may not work perfectly from Linux and with an unusual hardware configuration.