Well, there are the obvious reasons:
The show wasn't popular. When it was canceled, however, it received a booming response.
The show also cost alot and, due to low ratings, the show wasn't bringing in much money.
Now there is one possibly unimportant and oblivious reason that I find quite key.
In the murder trial of Scott Dyleski, The Invader Zim episode 'Dark Harvest' was cited, Which I find both gross and quite offensive.
Low ratings and an episode called organs.
Low ratings from the targeted audience
Invader Zim was first created by Jhonen Vasquez .
Yes , Invader Zim is a classical cartoon .
Invader Zim is a male Irken. It's that pink shirt he always wears, it looks like a dress.
GIR is the robot on Invader Zim and is voiced by Rosearik Rikki Simons .
Low ratings from the targeted audience
Zim from the cartoon series 'Invader Zim' is an alien invader from Irken .
Invader Zim was from the planet Irk .
Invader Zim was first created by Jhonen Vasquez .
Yes , Invader Zim is a classical cartoon .
Jhonen Vasquez wrote Invader Zim.
Invader Zim is a male Irken. It's that pink shirt he always wears, it looks like a dress.
GIR is the robot on Invader Zim and is voiced by Rosearik Rikki Simons .
yes. you probabbly haven't ever watched invader zim if you do not know that.
Yes , Invader Zim is very amusing if you like dark humour .
The character of Tak debuted in the Invader Zim episode "Tak, the Hideous New Girl" .
no - invader snoflake