The very word 'button' is is a skeuomorphism referring to a physical object. There is nothing wrong with visual cues hinting at a physical button if you are going to call the object a button.
A lot of hate for skeumorphism comes from using ux that resemble or preserve obsolete physical objects. Like floppy disks, corded desk phones, flip phones or analog clocks.
Buttons are great. We still press lots of them every day.
But sure, they're animated. I'm referring to the design of the buttons, not the animations. Try this on for size: https://dribbble.com/shots/5915773-Unlock-calls
I don't get this obsession with Skeumorphism. IMO it's not a good look and should be left in the 2000's.