I've been fine with the G502 X Lightspeed (which should avoid said double-click issue due to optical switches) and some more efficient button use to compensate for the fewer side buttons.
Isn't that just the tact switch failing? Two minute job to replace...
I looked it up (because I had already replaced switches on previous mice) and the fix required carefully removing a rubber cover that is glued in place and tears if you look at it wrong. It also requires removing the skates at the base, which means buying new ones. Even if you do that, the switch is very hard to access. Easily a 60+ minutes job.
I bought the switch thinking it was a 2 minute job and it’s still sitting on a closet for when I have the patience to do it.
Unfortunately my Keychron M7 got double-click too. Getting very jaded with the mouse industry at this point.