Can someone explain to me what is wrong with those 2 pictures?

0412:

Chromatic aberration, you have sharpness falloff in the corners and the asset is underexposed as shown in the histogram:

In addition, I would lift the contrasts.

8179: I would fix the exposure in the light and in the dark parts of the trees. In both you have clipping and the bright areas in particular are overexposed and detail is lost. I would also crop the picture wider, so that the big rock in the front is less visible. But that is a personal preference.

Both pictures are generally speaking, not bad. Some corrective processing and they will pass.

Both seem to have more limited DOF than I would expect in a landscape images. It looks like you focused on the foreground rather than the midground; do some research on hyperfocal distance to review where you should select your focal point for landscapes. The first image is also significantly underexposed. They're both quite beautiful, though !

Cliciing the "Auto" button in Camera Raw brightens up both images, which might help.

I couldn't look at it in full size, but the first thing I saw was this: In both of the images, there is a flat strip of cloud-like layer across the blue sky at the top. This didn't seem natural to me.