Most Gambits are one trick ponies. Good for a one time win ....
With some gambits based on zingers once you figure out what piece(s) to deploy where... the gambit backfires in some form (tempo, material, positional etc)
In this case... Nc3 or a pawn to c3.. seems to get in the way of the standard attacks.. and Black falls behind in development.
I was having a bad strike on another website with poor games unfortunately. But luckily i faced 3 back to back!! englund gambit players and earned my points back. Such an easy opening for white to win. Really dubious gambit.