Hahaha Windows users having sense

have no idea how to install another OS

True one can install it on Mint. But at that level, just

• install Kubuntu
• add timeshift
• run unsnap (removes snap, installs flatpak and flathub, installs apps as flatpaks)
• add the new official deb repo for Firefox
• remove a possibly installed Firefox Flatpak (has missing sandboxing) and install with apt

Linux mint has no GNOME or KDE variant, so while they fix many Ubuntu issues, they are still on XOrg.