I consider myself to be an average or slightly below average player. I’ve been running a celestial blood/curses scourge for the lols the past couple of weeks. In wvw 1v1s I’ve won maybe 30-40% of fights. Not great, but better than the 100% loss rate you’re suggesting. These fights have been against core guardians, reapers, dragon hunters, eles etc (ie melee or similar range adversaries) but specifically avoiding (where possible) rangers and thieves 😉
when havoc’ing with a handful of friends, we feel the positive difference my boon rips bring to the fight.
I imagine someone who’s better at the game would have better results, of course. Lastly as comparison, when I run a celestial death magic harbinger my 1v1 win rate tends to be more like 60-70%
hope that helps!