So I'm playing as Germany (after forming Prussia and taking all the cores associated with it) and as you know you get claims throughout the entire region. I managed to get all the land I needed without a major coalition, but with France, Sweden, Bohemia and Spain as allies, I started to play a bit agressively and ate a few of the minor HRE states (before I lost my claims) and obviously everyone in the world coalitioned me.

At first I was triggering them before they grew too big, and (I suppose foolishly in hindsight) kept eating land as I was winning these coalition wars.

But then France pulled me into a war with Russia where my army was stack wiped and I was 100% sieged and then Lithuania declared a coalition war. In the end I had to annul treaties with France and Spain (who then rivaled me), spit out a prince and give land left right and centre. But countries continue to join coalition wars, I lose and we get truce timers but as soon as they are up they join again, so it seems I am constantly at war against these massive coalitions and it seems they won't be happy until I'm cut down to the three provinces I started with in 1444, and we're well into the 1600s at the moment.

How can I deal with these coalitions? It's beyond a joke! Also, Austria has been just as aggressive (if not more) than me the entire game (not just the 25 years I had claims everywhere) and not one coalition formed. Is my game basically over at this point?