updated nvidia driver to latest 435;
winetricks, installed latest dxvk version 0.20 (not master);
set prefs ini to full screen (dxvk complained against windowed mode) and removed W/H cfgs from such file as I couldnt guess the correct one, later I used xrandr and chose the maximum one (not whole screen tho, but it may work too);
followed this: http://linuxconfig.org/improve-your-wine-gaming-on-linux-with-dxvk;
sudo apt install libvulkan1 libvulkan-dev vulkan-utils;
sudo apt install libvulkan1:i386 libvulkan-dev:i386 vulkan-utils:i386;
sudo add-apt-repository ppa:graphics-drivers/ppa;
(use export WINEDEBUG="err+all" and install everything required in the ":i386" way in case of complaining about something like wrong class 64 bits)
updated everything thru software-update (including kernel) and reboot;
obs.: this fixed also other games missing custom main menu backgrounds and music or even crashes;
(if it works for someone else, I can mark this as accepted answer)