Well, I don't have any specific recommendations for you, but I can suggest one thing. You might do well to do some reading about how a plane flys. Sounds silly, but knowing the aerodynamics will help you with things like understanding stalls, snaps, angle of attack, wingloading and so on.

I suspect your reflexes and "stick wiggleing" ability isn't the problem, instead there's a good chance that you're doing something like holding "up" while the plane noses down and does a death spiral or stall-spin to the ground.