You get hit by this a lot because you have the most predictable playstyle of all. Its great that you can distract and survive for minutes versus some people, but just holding S and right click without method should have some kind of quick kill counter, outside of having to carry an axe.
I've only been doing this on my new character, which is a bit of a trollolol character (8 shield skill). The armour i wear on it means that i get killed in 1 shot by most weapons, so i don't think it's unreasonable i hold my shield up a lot on that character. On most of my characters i use 3-5 shield skill and more armour however, so i don't play anywhere near as defensively.
Regarding it being without method, that's just completely untrue. I hover around mass melee with a spear waiting for cav to rear as well as ganking overextended players in teamfights, i protect archers, i choose where to fight tactically, not without method at all. In 1v2+'s i target select, spam, move, and am usually very aggressive (attack as often as i can). If anything's without method, surely it's the legions of heavily armoured 2h's who take no shield and yolo charge towards a teamfight where they mindlessly spam their greatswords until either they're dead or an enemy is dead?
There already is a quick kill counter; if i get hit with 1 ranged weapon, cavalry lance, 2h sword, polearm, most 1h swords, etc., i die in 1 hit. Having a system which makes it literally impossible for me to block (and therefore fight) in a 1v2+, is not a good system.