You talk about Collodi? He is in a different league and easily beats tough masters. It was especially true before the cuddle. And I guess it was that time when somebody won with Collodi, right?
With a proper crew Ophelia could also be competitive but you need very lucky not to meet with Hamelin. For that single reason, I can't say Ophelia is a strong tournament choice. If you paired with Hamelin, good bye 1st place.
So maybe I wasn't too precise in the wording: you met with 2 Henchmen who were either weak by default or had strange minion selection.
Your opponent's playing strength in general has not much to do with your game. Even the world's best player commits mistakes. Taking Teddy was a big one in a Recconoiter. From there it was an uphill battle for him.
Please note that I didn't say anything about my perception of Marcus' strength level. Actually I agree with you about this.
And as I see you took my notes a bit personally, I underline again: winning a 20+ tournament is always a big deal. So thumbs up!