I would count the 30 Years' War as a dead loss for Spain, Rome, and the Hapsburg empire. The aim was to crush Lutheranism and bring those sections of Germany back into the fold. Militarily, socially, and religiously those aims were not met.
The aim of the Austrians originally was to make the elected throne of Bohemia hereditary and theirs.
The Austrians had held the title as an elected one since 1520. The Bohemians elected the Count of the Palatinate.
The Austrians won, though not easily, and the the Bohemian's chosen monarch was called the "winter king" as he only lasted one winter.
Feeling their oats, the Austrians saw a chance to assert their domination over Germany as a whole. How much religion was a reason and how much it was nothing more then an excuse is murky.
The Danes and Dutch rallied to the Protestant cause...but it was not enough.
With the Brandenburgers and Saxons quaking in their boots - and considering bowing before the Austrians, the Swedes landed. While they were incredibly effective, it was interestingly French money that kept them in the field.
The Swedes managed to save Germany, and were actually starting to threaten Austria itself when their brilliant monarch was killed in battle.
Shortly thereafter, seeing Spain and Austria were weak from years of fighting, Catholic France officially joined the Protestant cause and thrashed the tired Spanish and Austrians.
So the 30 Years War came to a close with Catholic France the clear victor...though Austria would keep its hereditary claim to Bohemia until 1918...
Catholic Poland and Protest England both important powers at the time had managed to stay out of the conflict.
Overall, I think the religious elements of the 30 Years War have been exaggerated at the expense of the Austrian urge for territorial aggrandizement, though that was certainly an element.