Car owners are considered selfish, it is not considered a sustainable or equitable form of transport.
Air Conditioning, not a traditional things but getting more popular, not considered sustainable.
Travel, airplanes produce a lot of emissions and aren't considered sustainable. Not uncommon for people say why aren't your traveling somewhere closer and/or taking the train across Europe.
Meat, bad for the environment, bad for the animals. Non meat options are extremely popular here.
Dairy, if you ask for milk in a cafe they might play dumb and then ask you "do you mean cow milk". Most of the above I agree with, but I love my milk. Damn passive aggressive baristas! But yeah, the dairy industry is pretty abhorrent so they have that going for them.
All in all though, I'm probably the type of person the OP is probably trying to get away from. But honestly, Europe has plenty of problems but this stuff is literally why I love Europe