My biggest annoyance is with Google. They know who I am, they know I am traveling, they know my language preferences (English) and yet I still get language based on my location on certain pages. I let you track me Google, please use it for some good UX and not just advertising.
Lately they've decided that auto translating the local language into English in Maps reviews is the wrong thing to do. They translate every other language into English but somehow since I live in this place I must speak the local language too, so I don't need that in English.
Ditto for search results. Surely you want Wikipedia in the local language! I mean you've been there for so long! You search for things in the local language, surely that's a sign of your preference and not the fact that searching for things locally requires use of the local language.
This also applies to so much other "we must make our software so smart and guess all your preferences". Google fails so consistently at this I cannot understand why they persist other than some sort of misplaced corporate self regard.