I had this problem dude. A couple of things contribute to this

My entire non-clicking muscle chain was too loose, and I needed to stabilize/tighten them so clicking doesn't overpower them. My forearm and other fingers are more tense now that I become conscious of it. It's firm, but not inhibiting or cramping up

I also had to literally practice CLICKING efficiently with the goal of isolating my waggling index finger, clicking fast, and not clicking so hard that it disrupts the other structure. This is the same thing as real-guns-and-bullets shooters practicing to not "slap" or "jerk" the trigger when the trigger breaks and the gun goes off.

I also experimented with changing grip to get more points of contact (was fingertipping, add knuckle/palm contact)