I have no idea why someone would ever think that, they are players just like you, but with much more experience and/or courage. Everyone misplays from time to time, how often depends on the ability to focus and the mentioned experience.
Many of them don’t build too much themselves and often use netdecks because of easy accessibility. Yes, most of them are definitely above average when it comes to the ability of building decks, but that doesn’t mean they have to use their own decks all the time, they may play someone’s else deck to e.g. see weaknesses of it to abuse them later.
A single loss doesn’t mean anything. Hell, even multiple don’t. You know Dragall, right? I’ve played against him several times on the ladder and I don’t think he has ever beaten me, even though I’m almost always playing off-meta decks. I lost to him only in Gauntlet, where I’d say I’m more experienced, because I played around one type of burst and went into range of another. Does that make me think I’m better? No way, he’s much mroe experienced and I’m sure I’d lose to him in a tournament, if I played in those.
Details like that can change the outcome of game, there’s also fatigue, illness, lack of motivation, overconfidence, bad match-up, bad RNG (especially that Duelyst is dumbed down more and more), etc. - many things you should be able to think of as well if you go deeper.



