Not anything to write home about informal
To be not special, exciting, interesting or remarkable; to be very mediocre, unexceptional or unimportant
Her dishes are not anything to write home about. I don't understand why they keep complimenting on her cooking
A: "How was your trip to Madagascar?" B: "Well, there was almost nothing to write home about."
This book is not anything to write home about.
Her performance was not anything to write home about.
be less importance, less outstanding in comparison with something else
1. Used to refer to a thing or matter that is insignificant or unimportant
2. Used to refer to a very small amount (of something)
Someone or something is not very skilful, effective, good or remarkable.
To do paperwork that is boring or unimportant in an office
If something is not worth a fig, it is not important or considerable.
This idiom originated in the late 1800s, possibly among troops stationed far from home, and became widespread during World War I.