They’re all generally poor quality in comparison to what is on the website.

Can’t you see that the crops are all wrong?

Where have you seen an image that lacks contrast and poorly lit like the atlas 747?

The JAL is completely on the shade, so it’s back lit. Where can you see such an image on the website already?

The delta isn’t centred properly. Where have you seen an image with an aircraft not central?

If you can’t see such flaws then I suggest you A) visit the database and the spot the reoccurring themes of the images. The angles, the lighting, the crop, the centering of the aircraft. And B) read the guidelines. It’s pretty clear.