At least when you play against someone with sprint you have to chance to shoot him compared to armour lock its just OMFGWTFIMGONNADIE!!! and press X like a ***** so you wait for your teammate to shoot ur attacker. And did sprinting away from rockets ever work for u :/. and when you dont succeed shooting people that sprint away tou might aswell be a crappy shot. And i think ur just one of those guys who can't aim properly and just armour lock when you get shot 1 time.