my first complaint is you being absent when your Germany events fired, which made we couldn't attack you or your vassals, thus stopping them from firing
Remember that you got a sub for me and he obviously prevented any attempts to take over German vassalls.
second is the 'role-playing', i admit, the first session, this worked in my favour, but it doesn't seem to apply to the GM or his allies
When in doubt wether something is reasonable within the context of the time than it shall be up to the player to decide. Explained this already. Situations like Austria annexing/vassalizing Poland did not happen in reality but were plausible. Emperor Maximilian II. for example made a bid for the polish throne.
I simply want to prevent people from exploiting the usually powerfull AGCEEP events. Most other things can be handled through in-game actions. So if you don't want English expansion in Scandinavia there is a simple way to do this: issue a guarantuee and intervene on behalf of the AI.