Instead of disabling the plugin, you should try increasing the container of the slider. It will make the images fit there perfectly.
You can do it by adding these codes to the custom CSS of the Customizer:
#x-content-band-3 .x-container.width{
width:100%
}
.rev_slider_wrapper{
height:350px;
}
.rev_slider{
height:350px;
}