Have you seen any evidence of the barbless hook moving during the fight? 15lb mainline and a size 10 seems a bit unbalanced, have you tried upping the hook size? The thicker wire may help spread the load as it were. Are you aiming solely for carp? Or are you just happy with whatever comes along? If that was the case, Iβd probably go down the Avon/quivertip route or a float outfit with lighter line and smaller hooks. If I was aiming for solely carp, Iβd increase hook size to an 8 or 6 and use baits that smaller species canβt easily take.
do you use any form of clinic or carp antiseptic solution on your hook marks before returning them? This is important regardless of size as it can help heal marks like these and prevent infection. Some also harden on contact with water, so will help minimise bleeding.