I would love to submit a feedback request.
I constantly work with tables that have more than 20 columns. The columns I need usually are 2-3 in total and when I need to discard all the other columns I stumble upon 17 clicks.
Although I am able to select them all, I am unable to un-select most of them. I am not sure what would be the best UX wise decision but I would love to see an easier implementation of this, rather than clicking 17 times.