No it wasn’t.
And as an example ROTFL not only isn’t three letters, but it isn’t an English acronym but an initialism (the Americans confuse the two, hence TLA which originated there and referred to the original BBS three letter acronyms and initialisms.
Crying ‘pedant’ every time somebody spots you have blundered just means instead of getting away with saying you’ve made a typo or had a spot of brain fade, now everyone knows you are just educationally lacking.
I’ll not continue this discussion, I refuse to have a battle of wits with someone who obviously can’t defend themselves.