I think we can objectively say that dying before you are even aware of your opponent, or have any worthwhile counterplay against them is a significantly higher levels of frustration than usual.
It becomes a very one-sided interaction.
For real, the devs have gutted or removed 5x “oneshot combos” from the game, which have longer cooldowns. And overall reworked a THIRD of the heroes in the game on the basis of how frustrating it is to play against them.
But you think “oneshots” which have less than a second between them, on heroes with relatively low levels of counterplay, are a non-issue when it comes to “excessively frustrating to play against”?
And if you think it’s a non-issue to be concerned as to whether the overall game is fun. Then they just sounds like you don’t want the game to be more popular.
Heck, you’re basically saying hero usage variety, I.e. Novelty, but Fun is not. When Novelty is a component of Fun.