you're missing moves in that sequence.
How can black has two moves after e5 followed by Nc6?
It sounds like you're talking about the Ruy Lopez, in which case there's no way to crack it since it has been around for hundreds of years and masters still use it.
Just keep improving your position, preventing their threats and plans (except for the bad ones), utilize restraining pawn moves and attacks when appropriate and their mistakes will come.
Novices are such because of a deficiency in many chess fundamentals and relatively poor board vision, or not fully grasping the spirit of the position (its most important imbalances, novices try exploiting an open castled king against the Sveshnikov and ignore the weak d5, d6, b6, and f5 points and not even try restraining a thematic f5 advance for example)
Many beginners like to play like this when facing e4 as black:
e5, Nc6, h6, Bc5, a6, Ba7 (if the bishop is harrased by Nc3-a5) , Nf6, 0-0, d6, Bd7/Be6/Bg4
Can someone crack it?