The concept of presumptuousness Is there any word or short phrase in Chinese that expresses the concept of 'presumptuous' as in 'arrogantly making assumptions about the beliefs or preferences of another person without regard to the possibility of being wrong'.

If you can provide any written examples, even if it is a full paragraph, of authentic articles or literature which uses the concept, it would be most welcome. 

The idea I'd like to translate is: "If I was only allowed to use one word to describe my experience with Chinese, I'm afraid it would have to be 'presumptuous'. I've encountered so many Chinese people who not only assume anyone with white skin automatically would like to have a conversation with them in English, but also that the conversation partner won't mind the conversation being one-sided. Whenever I've been in such a situation, the Chinese English learner tends not only to miss all the important points I wish to express, but also to pretend he did understand them, leaving me no opportunity to clarify. This leaves me feeling very incontent, used, and exhausted by the end. "

I've only provided such a long sample of text to be precise, I'm not looking for a translation of a paragraph, only the means of expressing this one  concept. Unless you'd like to translate! Finally please don't make unwarranted assumptions about me or take offense to this question. It's absolutely not meant to insult anyone!
The concept of 'presumptuous' as in 'arrogantly making assumptions about the beliefs or preferences of another person without regard to the possibility of being wrong'.


The words that fit those descriptions would be 自以为是 (literally 'regard oneself as infallible') or 自作主张 (literally 'presumingly assert/decide'). 自以为是 would work perfectly for translating your paragraph. There is also a colloquial word with similar meaning 想当然 (literally 'assume sth. as a matter of course').

If you consider some similar but different concepts, you'll have more word choices. E.g. prejudice (偏见), stereotype (成见), ignorance (无知/愚昧), etc.