TouchBar
I recently bought a MacBook Pro M1, and before that I never had a mac with a touchbar.
In my experience, at first you gotta learn what it's good for, what it's functions are, the position of those functions etc. but once you get used to it, it's actually get your things done faster than a keyboard short cut, that is: less clicks, and less energy spent.
In conclusion, i believe that those who complain about it are just those who were too lazy to figure it out and get used to a new thing, so they just kept using the shortcuts they knew, and blamed the touchbar to be useless.
But honestly, to blame is the one who sticks with what it learned, without making efforts to adapt to new things, even if those ultimately bring improvement in productivity.