I've been using git for windows / msys2 bash for a while on top of WSL2 - you don't find it to be annoyingly slow?
GIT is slower on cygwin, especially stat() with do hacks to check for +x mode. But once cache is warm, it works fine. Albeit, I didnt used GIT under Win10 from quite some time, im doing most of my stuff on older windows using my very old Cygwin fork thats is more snappier :)
So, cannot say much about Win10 + msys2 + new GIT performance here. My laptop is slow anyway with all the bloat IT put there :)