m8 either you need to l2p or...
...Which is exactly why he's here asking for advice on how to counter OKW. Don't get why you're being so condescending on a section of the forum that's literally intended to help players get better at the game.
And to the original poster: As many people stated, infantry sections are probably the strongest mainline infantry unit in the game, which is why you really want to leverage their strength. This means getting the early 5 man upgrade and potentially upgunning them with brens. 5 man sections with brens should beat fallschirmjager in equal cover engagements at long range (and, really, you dont even need to straight up beat fallschirmjager 1 for 1 given the difference in costs).
If he throws a lot of infantry at you, you can usually just throw a lot of infantry right back. Invest a comparable number of squads, and you'll probably win.
Outside of a bunch of infantry sections, you usually want one engineer squad to snare vehicles, a couple of AT guns (the specific number depending on how many vehicles he has), and, importantly a sniper. You do have to use snipers more cautiously against falls because of their camo, but as long as youre not taking any unnecessary risks, the sniper should end up doing a lot of work. I can't emphasize this enough, OKW just doesn't have any direct counters to snipers.
As for tanks, I honestly find that they're largely unnecessary. Currently, I usually opt for the crocodile or valentines, but have also went for comets when I've had the room to. My main point here is that UKF doesn't
really need to use tanks of their own to threaten the enemy, they mainly need them to neutralize the enemy's tanks. To that end, it's usually fireflies or comets for me (again, when im not going for the doctrinal options), and never really centaurs or cromwells.