Preview doesnt show my composition

I don't know the reason for that, but what i know that AE some time required a few time to load the project specially on heavy project where you have lot of composition and effects, i notice this in different PC, most time the GPU accelerator speed up this a lot but it look like you already activate the GPU accelerator.

It's hard to say because I can't see the modified properties of the layer that should be visible in the second screenshot. I also don't know what is happening with the POV Comp, the only layer under the CTI. The frame in the screenshot is an unselected layer and it could be way out of position. If pressing Shift + / does not center up the comp and fit it in the Composition Panel and you don't see the transform handles on the POV Comp layer when it is selected then I would start by looking at GPU acceleration and the display preferences. This looks more like user error than anything else to me.

I can tell you that it looks like you are trying to edit a screen capture gameplay video in AE because your comps are very long. The POV Pre-comp is 11 seconds long in the Project Panel but only about five and a half seconds in the Final comp and you are zoomed way in on the timeline so the final comp is probably several minutes long. That's a pretty inefficient workflow. If all you are doing is time remapping and adding a few short layers I would do most of the editing in Premiere Pro.