I do a lot of gaming on Linux, usually running Windows games with either Lutris or Steam's compatibility mode. Lots of games work perfectly with performance just as good as in Windows. The dxvk project has been a fantastic help in that respect - it translates DirectX calls to Vulkan equivalents, so we don't need a reimplementation of DirectX anymore, and we get the same level of hardware acceleration you would get from DirectX. (IIUC graphics drivers have acceleration for high-level calls to both DirectX and Vulkan.)
Unfortunately from what I see in protondb Destiny 2 doesn't run on Linux due to its particular anticheat implementation, and Hunt: Showdown has a "silver" rating which means some things don't work perfectly.