The phrase "huge annoyance" refers to something that is very bothersome or irritating. It means that it is a big source of frustration or annoyance.
Sentences with «huge annoyance»
I'm curious to know if you noticed problems with color reproduction, ICC profile issues (HUGE annoyance of mine), or sloppy cutting / margins. (theabundantartist.com)
Exactly those minor things, with time, become huge annoyances and manage to generate a large amount of resentment and frustration. (marriage.com)