Im sorry, but once again you are completely deluded. First, i assume you mean rank when you say level.
And from Rank 30 to 25 is the area for beginners using starter decks and that barely know the game, so someone experienced having no trouble in that climb is no big deal at all. Even from 25 to 15 its mostly players who still dont know the game, but they may start getting some decent decks.
Also, the game has been simplified and dumbed down so much even at high ranks like 5 to 1, there are still lots of Prestige 0 and 1 players, as a Prestige 8 i felt like a college student in kindergarten. And guess what they were using - finetuned netdecks for NG, NR and SC that can carry any player into high ranks.
Rank ofcourse, yes. I know rank 25+ is bad. But it's also returning players like myself. I could easily see that some of those guys had experience and a way bigger collection than my completely new account.
Anyways, I won against better decks and better collections, due to the way I played those cards. My point being that it's not all about the cards as Fhrek claims, it's also about the decks you put together and the way you play them. And really, my deck was terrible, it was basically just whatever cards I had available tossed together in a deck, no way fitting together well, not even reaching the provision limits etc and having more cards than 25. It was a disastrous deck, but it was what I had, and it was enough to win almost every single game (not due to the cards or the deck).. Ofcourse many of the opponents were bad, but surprisingly many had decent decks with non-starter cards, and I know a few were returning players.
Besides, console moving players have to start back at the lowest rank too, something I will experience when my account is finally moved over.