Nothing about mercury retrograde has caused any kind of "bad luck" for me. With my latest experience, if I've experienced difficulty communicating I chuckle it up knowing what the heart emits is more important. Yes, sometimes we frame our minds and set ourselves up for undesired experiences based on the expectations we hold onto. I don't worry about mercury retrograde but if I notice I usually recognize the collective mind or energy as prime real estate for introspection, which ends up being completely healthy and positive.

Not sure who you are quoting about “bad luck”. While communication has slowed down and I have encountered technical difficulties I am not considering it bad luck. In fact I am rectifying some electrical and internet challenges. A time of introspection on events and reasons for slow downs when Mercury goes retrograde. Also to revisit some past communication experiences with close ones, recognizing their significance and finding the best way to handle them through communication differences.
An interesting observation. In this case I did not not recognize the retrogradation of Mercury. It was after the facts and conditions that I saw Mercury has been goin retrograde. So setting up the mind for undesired experiences would not apply until perhaps now when i’m aware of the planets corresponding effect on challenges unfolding. But as you see recently I am attempting to address differences where possible.