I just hate the feeling of the spring vibration and the metal boing sound when i'm bashing the buttons

Not sure if anyone else had a clear moment like i had ( i searched) but this is how i fix this annoying problem.
I grab some cotton, the stuff women use to take their make up off.
I roll a very fluffy thin cigar and put it into the spring. When it's inside pluck it a little bit to make it expand even more. You just need a little bit, too thick and pressing the buttons will be heavier.
Done, the buttons will feel super sturdy now

We can continue to bash all day long, my favorite hobby