Does incorrect word usage in English annoy you, and how do you react?

I have 2 examples and I don't claim to be fluent in English, but I see these 2 words being used in ways that don't make sense.

AN vs. A - it annoys me when I see people not using them correctly.

HOSPITAL - this is a weird one that I don't understand. you should be saying THE HOSPITAL.

-Thank you for your attention to this matter.

Does incorrect word usage in English annoy you, and how do you react?
Does incorrect word usage in English annoy you, and how do you react?
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