A bit of .......


I am translating a piece that says that there was a bit of (uncomfortableness, sourness, annoyance...???) between a certain country and other countries due to a certain political stand or view it had adopted...
The question is, I am not sure about the feeling I should put in between brackets...It is like this: other countries are not enemies but nor exactly friends either, and it seems like they are fishing for mistakes or waiting impatiently for more mistakes of this country so that they could point them out. How could I describe such a feeling?
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