locked out of using mouse and keyboard?

bought the game on sale since i remember playing the first campaign mission awhile ago and enjoying it, however for some reason the game just refuses to acknowledge i'm playing on a computer
have nothing plugged in, but as soon as the game opens all i'm able to do is move my mouse - menus register no clicks or inputs - but the second i plug a controller in the issue is nonexistent
there are some other oddities that have proven to be a bit annoying (video settings resetting every time i open the game for one thing) however i don't mind that as much
is there any consistent fix for this? since i don't want to be forced into using a controller just to play one game on the side
i've tried both repairing and disabling overlays but it hasn't fixed anything from what i've seen