Same thing happened to me a while back, Then I thought about it for a while and reaized I was making a few basic errors like getting myself isolated and stuck in a middle of an enemy pack, I got too low and often slow too, I was biting of more than I could chew also.
so then I went back to basics, I try and stick with some Squaddies or other friendlies and don't let myself get isolated with no chance of an escape. Think I'm coming through it now, but I do understand your position and I betcha there's a whole rack of folks who have been there too.
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