It went over everyone’s head because sarcasm in pure text fails more often than it succeeds. Lack of tone is massive, and the hidden fact that you and the OP are connected in any way is totally lacking.
If sarcasm in a text environment like this is to be used, clear and overly obvious flags like emojies and the /s tag are worthwhile at the very least. Otherwise it is far too easy for that approach to be misinterpreted.