The controls are more intuitive, but to me the largest improvement they made was the "feel" of movement and interaction. In 2, it all felt jerky and clunky. In 3, it's a lot more natural. --- I'm not with you. You're not with me.
In a way, I'm grateful for the convoluted control scheme, as it keeps the community mostly free of hyperactive prepubescent kids, and also serves as the first trial into the game IMO.
If you don't have enough patience to learn the controls, you'd never have the patience for the pacing of ARMA anyway. So it's a nice hurdle to keep out the complainers I guess, in a twisted sort of way. :P
Best of luck learning the controls mate, they're not too bad, hope you end up loving ARMA as much as me! --- Light travels faster than sound. This is why some people appear bright until you hear them speak.
Yes, it is very difficult. If you want instant gratification stay away from Arma. It's when you combine all of the control conventions into an immersive experience while raiding an objective with friends that you will come to appreciate the options available. There are multiple types of lean around corner options for god sakes.
Play the variety of showcase missions and you will learn soon enough. --- Asus Sabertooth z77 - Core i5 3570k @ 4.5Ghz - Hyper 212 Evo - G. Skill Ripjaws X 16 GB Ram - EVGA GTX 680 - Xion 1000W PSU