I've had 3 LineX liners, overall very happy. I've had drop in liners as far back as 1980. BOTH if you shovel things in and out a lot, ie daily doing construction type stuff as I have, BOTH options can chip, peal, break, get holes etc. The spray in liner is the better option overall, tougher etc. If you hit the wheel well with a pallet, pushing it in, it can still dent the wheel well, peel part of the liner. Dragging gravel out of the bed with a trackhoe will peel the liner......anyway, probably what most would call abuse of the truck etc compared to what I have done over 35 years doing landscape construction or maintenance. Truck etc doing what it is, a tool of the trade!
Marty