A strong opponent passing suffocation

3 d6 just gives up the pawn for nothing
4 Bb5+ has no point. 3 Bb5+ at least keeps the pawn
5 Bxc6 just abandons the bishop's pair
Black went wrong later.
He made the last blunder, so you merit the win, but it is in no way linked to the opening.

Have you heard of the psychological school of emanuel lasker?

Not always the standard of openness leads to the victim, psychological bids are very good.

Before applying psychology to a choice of moves, one must understand their consequences in purely chess-related terms. While 3...d6 takes the game out of standard Scandinavian waters, it also improves Black's position at no cost: Black now doesn't have to waste a tempo recapturing on d5 and gains an extra central pawn.

I am not sure how much that depended on the Scandinavian being played. A bigger deciding factor was probably that they blundered mate in one.

You can't post in the forums yet. Play some games!