Is it possible to rotate the map in game like left or right?
cuz sometimes i struggle to see enemies behind, or is it just better to be like it is?

Not really, e.g. grass and tree foliage would look all wrong if the camera could be rotated in-game. Flipping the camera when loading a map is possible.

Visualizing the models behind buildings and large obstacles needs to be improved.

It takes a little practice to make it fluid, but the trick with those enemies around corners (hidden on farsides of structures) is to sight on them before breaking cover. Then watch the reticle for yellow when you have a clear shot. Once you get the timing right, after a bit you start to pop out and clear those hidden guys well. It's also possible on many high ledges to do the same tactic almost right over them on far side of buildings when they are up against the far wall. Just look for the yellow to pop them.

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