No, you come back because you think you can do better/more because woltk are a complex pvp game; futhermore you have the "adrenaline rush" of pvp.
Your frustating experience are due to you (because you chocked) and because you know at the end you can't do something.
wow is unbalance like every game, in a competitive env this getting worse when time spendding. Look at overwatch, one meta is install, the last patch change nothing and people getting boring/ fustrated. On warname is way worse because there is no patch to change the meta, so the meta is along the same years after years. Futhermore sm was add on shop, and the nightmare because more terrible. (this is when you can't do something)
when a sm carrier tunnel vision, play badly but still win because when he touch you, your are dead. It's frustating.
This is because pvp is competitive, the matter are double, player, and admin/dev. Along years player are not competitive, it's become a tryharding by using all abusing thing like all game (this is where admin/dev are guilty.). Thinking by crushing other player and zero death is skill. But they forget even "god" of pvp die, can't do something,... They forget what's skill, a way you do appropriate\less\clever spell, move, ...to counter the opponents.
As you can see in bg people are packing when they see opponents they 'll use everything, (fear, bomb, stun, wing, zerg, bs, trincket....) at the same time even if they are 10 vs 1, and thinking there are skill. It's laughtable. The skill lel getting way worse, and that it.