[Squirrelloid]

Ghoul31:
(1) You never approached me diplomatically. One might think that, if one should find oneself bordering a powerful nation, one might at least attempt to find out their intentions rather than blithely assuming they were peaceful, if not attempt to get assurances as to those intentions.
(2) I approached you for a bribe to avoid destroying you. Tribute, if you will. You responded with demands. Needless to say, I was not impressed.
(3) Ermor was going to roll over you anyway, why shouldn't I get some provinces while you're on the way out? You didn't even attempt to secure me as a war ally against Ermor. Regardless of whether it would have worked or not, you certainly should have tried, as your survival was conditional on my willingness to go to war with Ermor.

I'd blame your current predicament on a total failure of diplomacy, not some 'everyone gangs up on the weak guy' mentality.