[Smush Pro] I'm having a trouble with quality of images

I’m uploading different images (from 3982 × 1500 to 1110 × 418), I tried uploading compressed images, tried put it full size in function.php, uploading with native image uploader & originsite uploader. I cant understand why in products the quality is good, but when I try to upload an image to put it like a banner on my home page it has bad quality. I hope you can help me…
Thanks!