Personal Woes and Advice 3

[Kalmageddon]

More detail is required before I can comment, but unless your tone of voice is condescending I don't see why saying someone doesn't understand is offensive.

Because I should say "I haven't explained myself properly" instead.
Even when I did my absolute best to explain something, even when treated to an answer that is obviously missing the point by a mile. Repeatedly.

Because the realization of having been unable to understand a concept is apparently so terribile that no one should ever have to face it.
As for my tone of voice, there wasn't any, it was via text.