"Why is this taking so long?"

"Unforeseen complications"

"Why didn't you factor that in while estimating?"

"Because thats impossible, by definition."

Hence "unforeseen"

But that's too simple for them to notice

Many institutions do accept or even expect people to include an arbitrary time allocation for unforeseen issues :) it's pretty standard procedure.

Hope my boss read this. . . 😂

I can totally relate to this lol!

"Prepare for unforeseen consequences"

I don't need to estimate unforeseen consequences.

"How long does it take? "
"3 months when everything goes well."
"We told the customer it takes 2 months. "
"okay. "

Expected time to finish:
6 months , 3 for the job, 1for unforeseen stuff and 2 for doing other projects on a higher priority.

This is why for some task I double or even quadruple my time estimation in order to have time these unforseen complications as a buffer.

Still doesn't save one from being off. And still some manager will treat an estimation to complete as a promise to complete.