I'm guessing that that has a lot more to do with being on Apple Silicon than anything else. Steam and all the games are compiled for x86, which means it's gotta go through Rosetta and then through Wine. Also, on macOS specifically, no Vulkan support means you have to use MoltenVK to convert the DXVK instructions to Metal, and I don't think MoltenVK has completed the work to convert all the instructions Vulkan uses.

I was impressed I could get Windows games running at all, but the experience was pretty bad as you mentioned. Titanfall 2 was real janky, no audio and the graphics were super bugged.