The difference in FPs is gigantic from an xbox to a PC, it makes the game slow for one and fast for another. Keyboard and mouse doesn’t even compare to a controller!!! Ranked match must be fair not unbalanced.
Usually there is an option to exclude K&M players.
I am probably thinking that MS will roll out keyboard and mouse support for consoles also.
I made the jump from console to PC at the beginning of the year, best decision I ever made. Halo looks SO GOOD running on my RTX 3070