I thought we only had one who wore Shardplate, Renarin. Kal rejected the plate (and sword), twice. He rejected all of it, thinking as a whole it was wrong. . Dalinar was rid of his before he became a knight. None of the ladies, except maybe Jasnah, have any. And if she does it's from her Spren.
So the only knight with someone else's Plate has a corrupted spren. The corruption might be why he doesn't complain?
sorry I was away for a bit real world socks sometimes.