If someone is spamming you it probably means they think you're bad enough that it will kill you, and considering you complain about it..
Usually it means they're bad enough not to be able to reflect on their actions in the game, or cba to do it. People that keep doing the same thing and getting killed by the same people 9 times out of 10 are obviously doing something wrong.
Some of the good players do try spam on purpose when they see me (or so it seems) but usually they only manage to turn the fight into a boring blockfest. Overall, I find myself relatively weak to random spam because I love holds and feints, but that's only when the spam actually takes me by surprise. If not, I will play 100% defensive, even though in the end that's boring for both of us. I don't hate spam because it kills me all that often, I hate it because the most effective countermeasure is extremely bland.