Sounds like you played against @Merciless.
Lvl 67 and still gets hackusated for his sniping. Can’t blame people though, when someone plays something twitchy like sniping in DB for that long, their reflexes get kind of insane. And that’s all it is when someone dinks you lightning fast. Just very sharp reflexes honed over time spent practicing. I understand the “that can’t be real” feeling after also playing upwards of 700hrs though, just as I understand the other side of time spent = skill acquired. Chances are, it’s real. Merciless is so fast I don’t think his brain processes thought before he nails someone, it’s just reflex. Kind of fuckin gross tbh.
For what it’s worth, I’ve never seen you ingame either. Although, while Amerika is right, there’s also the aura XP exploit glitch several months ago that could explain some stupidly high levels running around. But probably not many. If their hours -> gameplay looks right for their level, I’d just accept their skill and move on.