c3 has been the antidote since forever - I'm not a really huge student of the traditional Morphy line - I'm a d4 player and go with the Berlin as black (because I'm wicked and hate fun), but, as it happens, I did prepare a Marshall repertoire recently for an opponent who knows my openings - so here's the theory which has been the main main line Spanish for over 100 years:
Players on the live server will probably not oblige you by playing those exact moves - because they simply don't know them - but the central way to fight against Na5 has been c3 (making a pocket) since the hunter-gatherers played chess with stones and nutshells on the savannahs of Africa.

Hey everyone, I've got a question about the Ruy Lopez opening.
From my research it has come to my attention that the exchange variation of the ruy lopez is much less effective and strong, it essentially gives black some easy play with an open file for the queen and diagonal for the bishop.
However, every time I play the non-exchange variation I end up with doubled pawns and my light squared bishop missing anyways as per the diagram. Any tips as to how I cn avoid the exchange of the light squared bishop without being too passive and retreating it. Thanks!