Yes, actually. Depending on how you build him, you can two-tap a 375 hp Juno. You’d have to proc a few very specific things, but you could.
Keep in mind, he also doesn’t exist in a vacuum. Any missing health on a target makes him stupidly lethal.
He’s in most matches because he’s overpowered.
They have travel time. Nothing is easier than putting your reticle on a target and clicking. No prediction or accounting for travel time required.