Boyega or Mark Hamill.
I say Boyega.
Had him marketed as a lightsaber wielding bad ass only to make him a janitor who repeatedly gets his ass whooped throughout the movies. Caught L's to:
Episode 7:
Daisy Ridley
BB8
Tentacle thing
Stormtrooper #816328
Kylo
Episode 8:
Rose
Hux bytchslaps him
Phasma
Rose again
Too bad they never made an Episode 9, they could've redeemed his character somewhat but I guess we'll never know.