That just literally sounds abusive (not letting a kid wee in a public toilet!) and I am not shocked why you're not fond of being in that house...
Your impending move sounds lovely, however, and I'm wishing you both all the best and hopefully everything will work out!
hahah I was thinking of Black Forest Gateaux instantly as well LOL
Yeah, definitely not cool.
FIL and grand-FIL are both good at gaslighting. There's a rat living in the house (in the walls, not scampering across the floor). We can hear it in the walls. We've seen droppings in the storage space under the stairs. FIL says it's nothing. Then he says he'll take care of it ('call a guy'). He never does.
SIL appears friendly, but is manipulative (IMHO) and talks behind people's back. Or in front of their face, in my case - she's used their second language to tell DH to tell me something I needed to do/not do while I'm in the friggin' room - wtf. Have I mentioned she has told us we don't love her kids enough and, when FIL was in hospital (and we weren't sure if he was going to make it), SIL was giving us updates (she has a car and lived closer to him and the hospital at the time), she told us we were stressing her out and 'risking the life of her unborn baby' (she was pregnant at the time). I avoid her at all costs.
Looking forward to Germany, especially being far far away from the in-laws.