No, its much less to do with the user when there are so many people reporting QC issues.
From within the G series, I've owned 102, 203, 402, 304, 604, 502 and now 502X. All of them (except the G502X, which is new) have been RMA'd 2 times, with the 402 at 3 times. Within an average span of 2 years each. I game once in 3-4 months and work in CAD, and take great care of my devices. Even then these just randomly fail. If you got a good unit, consider yourselves lucky!
Its like these devices are built to die soon- they have such amazing customer care (replacing the mouse no questions asked, each time)- so I'm led to think that the time bomb is part of the strategy.
I've also owned MX Master 2S and Triathlon for much shorter periods- sold them due to their pathetic sensors so I don't know how well they fare when it comes to potential double clicking issues.
OP, sorry to stray so far from the thread!