HI jan007
It depends on the image ratio itself, in small screen, it will be resized to fit the screen size.
You can try this custom CSS to improve it a bit:
@media (max-width: 575.98px){
.acm-hero.style-2 {
background-size: contain;
background-repeat: no-repeat;
padding: 131px 0 0px !important;
}
}